2014 - Page 5 of 11 - CrossExamined

Fine-Tuning of Particles to Support Life

“The fine structure constant could easily be larger, the photon massive, quarks heavier, or even worse, electrons, photons, or quarks might not [exist] .. Any one of these would be enough to eliminate our presence.[1]” Physicist Leonard Susskind

This blog is yet another installment in a series on how the fine-tuning of the universe for life provides evidence for God. Here are other blogs in the series:

This blog examines how hard it is to get the right type of building blocks to support intelligent life. Not just any types of particles suffice – no scientist speculates about photon-based life or neutrino-based life since there would be no way to store or replicate information[2]. Consider that every second you have about 65 billion neutrinos passing through the tip of your finger, and at night solar neutrinos travel unaffected through the entire earth before going through your fingertip. The only plausible forms of advanced life that could originate anywhere in the universe are based on atoms. You might think that the mass of a particle doesn’t really matter that much. It’s easy to envision ourselves being composed of protons or electrons or quarks of a different mass. But this turns out to be quite mistaken. The mass of particles is very important in determining their longevity, their suitability in sustaining nuclear reactions in stars, and their suitability for chemistry. In this blog, I’ll once again be extensively utilizing Luke Barnes excellent fine-tuning article as a resource, but I’ll also refer to writings of leading physicists such as Leonard Susskind, Stephen Hawking and Nobel Prize winner Frank Wilczek.

In order to have evidence that life-permitting physics is a small subset among possibilities we must have some idea of the range of possibilities. In this context, we’re on pretty firm ground. There is a maximum mass for particles as set by the Planck scale. The current concept of mass would become incoherent if particles could exceed the so-called Planck mass. The Standard Model provides a means of computing quantum corrections that affect masses, resulting in a natural scale for particle masses. Let’s examine whether or not the mass of certain particles has to be finely-tuned to support life.

The Masses of the Electron and the Proton

“If protons were 0.2 percent heavier, they would decay into neutrons, destabilizing atoms.[3]” Hawking in Grand Design

For this data, I’d like to show you a graph from Barnes’s review article[4] with notes about the various life-permitting constraints.

Credit: Luke Barnes Review Article

Notes About Diagram: The graph’s axes are scaled based on arctan(log₁₀[x]) such that [0,∞] maps to a finite range. Refer to my previous blog for a more detailed explanation of coupling constants but basically these are just the dimensionless fundamental constants that convey the strength of the fundamental forces. Here is some notation used in the descriptions of the life-permitting criteria:

α – the electromagnetic coupling constant (also referred to as the fine-structure constant)

α_s– the coupling constant for the strong nuclear force

β – the ratio of the mass of an electron to the mass of a proton

The tiny life-permitting region has to simultaneous satisfy each of the following life-permitting criteria and our universe’s values are at the ‘+’ sign near the lower left:

1) For hydrogen to exist the mass of an electron must be less than the difference in the masses of a neutron and a proton else the electron would be captured by the proton to form a neutron. Without hydrogen, there would be no water and no long-lived stars (e.g. Helium stars burn out 30 times faster).

2) Atoms are only stable if radius of an electron orbit is significantly greater than the size of the nucleus – this depends on the ratio of the electron and proton masses such that αβ/α_s < 1/1000.

3) The energy scale for chemical reactions should be much smaller than that for nuclear reactions. Otherwise, information could not be stably stored because the type of elements in molecules would be changing because chemical identity would not be maintained. This requires the ratio of the electron and proton masses to be finely-tuned such that α²β/α_s² < 1/1000.

4) Unless the fourth root of β is less than about 1/3, molecular structures would be unstable. They would basically be continually melting and thus disrupting the ability to store information.

5) The stability of the proton requires the electromagnetic coupling constant to be less than the difference of the masses of the down quark and up quark divided by a constant. This enables the extra electromagnetic mass-energy of a proton relative to a neutron to be counter-balanced by the bare quark masses.

6) This fine-tuning is related to the electromagnetic coupling constant and was covered in my previous blog.

7) Stars will not be stable unless β > 0.01 α²

Note that life-permitting criteria 2-5 and 7 also depend on one or more coupling constants and thus reinforces my previous arguments about the difficulties in getting simultaneous solutions to so many independent equations. There are also some additional constraints on the masses of the proton and electron not necessarily shown in Barnes’s diagram:

A constraint on the main nuclear reaction in stars. This depends on a finely-tuned strong nuclear force strength as previously mentioned but also depends on a particular relationship of the masses of the up and down quarks and the electron.
The ratio of the mass of the electron to the proton also affects the ability of stars to output photons at energy levels that break chemical bonds (this was also referenced in my previous blog because it also depended on force strengths). The dashed line in the diagram represents that constraint.
The mass of the electron and proton also show up in the equation for the cosmological parameter Q as described in my previous blog.

These tight constraints on the life-permitting region for the mass of the electron are even more surprising because the values are deemed “unnaturally low” to begin with. Barnes elucidates this issue: “There are, then, two independent ways in which the masses of the basic constituents of matter are surprisingly small … the Hierarchy Problem … and the flavour problem. … The electron mass is unnaturally smaller than its (unnaturally small) natural scale set by the Higgs condensate.[5]” These are called problems simply because they require fine-tuning – the values they take on are quite different than the natural scale. It’s possible that new physics discoveries might minimize the unnaturalness somewhat but the life-permitting ranges are so tight that there is no basis for assuming that the fine-tuning will go away.

There is also a tight constraint on the charge of the electron. The electromagnetic coupling constant can be expressed in terms of a ratio involving the square of the charge of an electron. Thus, the numerous constraints referenced in my previous blog can also be viewed as a dependence on the charge of the electron. Thus, consider again the fine-tuning necessary for the production of carbon and oxygen in stars. This required fine-tuning of the electromagnetic coupling constant to 1 part in 10,000. Thus, another way of looking at this is that if the electron differed in charge by more than 1 part in 100,000,000 in either direction then the universe would basically be devoid of carbon or oxygen or both.

In order to understand more details about the mass of the proton, a little background will be helpful. A proton is comprised of 2 up quarks and a down quark and a neutron is comprised of 2 down quarks and an up quark. Most of the mass of these composite particles is derived not from the quarks but from the energy due to the strong force that is constraining them. This binding energy is equivalent to mass as per Einstein’s famous equation: E=mc². Thus, we should also examine the sensitivity of the quark masses.

Quark Masses

“[T]he up- and down-quarks are absurdly light. The fact that they are roughly twenty thousand times lighter than particles like the Z-boson . . . needs an explanation. The Standard Model has not provided one. Thus, we can ask what the world would be like if the up- and down-quarks were much heavier than they are. Once again – disaster![6]” Leonard Susskind

The mass of the quarks is derived from the Higgs boson but the other approximately 98% of the proton and neutron mass is based on the binding energy of the strong nuclear force. Quark masses vary from roughly 10 to 344,000 times the mass of the electron and thus if the masses of the up and down quarks only support life within narrow ranges relative to possible quark masses, this constitutes a high degree of fine-tuning. Research into the physics literature reveals very widespread agreement that these quark masses are finely-tuned. Barnes cites at least 7 physics articles arguing for this conclusion. Physicist Craig Hogan affirms this conclusion: “Changing the quark masses even a small amount has drastic consequences for which no amount of Darwinian selection can compensate.” Hogan reminds us that fine-tuning deals with what has to happen before any biological evolution could get started.

Barr and Khan’s article considers the 60+ orders of magnitude in the space of possible up and down quark masses and document 9 different life-permitting criteria that end up constraining the life-permitting region to a tiny subset in the space of possibilities. I conservatively measured the improbability off their graph as no more than 3 parts in 10³⁶ – this makes it less likely than picking out one red grain of sand in a giant sand pile in Eurasia up to the height of the moon (to harken back to my analogy from a previous blog).

Most of these criteria are very clear cut disasters for life of any kind – for example there are constraints necessary to have stable protons, neutrons and atoms, and there are a couple of disasters where only one type of long-lived particle would exist with the chemistry of either hydrogen or helium.

Other particles

“Atoms, molecules and life are entirely dependent on the curious fact that the photon has no mass.[7]” Susskind

Susskind goes on to explain that no life could exist if the photon had even a tiny mass because otherwise electromagnetic force acts at too limited of a range for chemistry to be operative. The Higgs Boson has been in the news lately since it was discovered recently at the LHC. Luke Barnes documents how, in natural Planck units, the vacuum expectation value of the Higgs Boson must be between 4e-17 and 2e-14. He cites 4 different articles and multiple finely-tuned criteria.[8]

Even the mass of neutrinos turns out to require fine-tuning to support life. Tegmark, Vilenking and Pogosian argue that if the sum of the mass of the 3 species exceeds just 1 electron volt then no galaxies would exist. They refer to this as an anthropic constraint so they seem convinced that life couldn’t form if there were no galaxies, presumably since galaxies are critical for star formation. This constraint is significant since neutrino masses are so tiny compared to other particles. For example, the top quark is 170 billion times more massive than this!

Will New Physics Rescue Us From the Need for All of These Fine-Tunings?

Physicist Craig Hogan argues that the “two light quark masses and one coupling constant are ultimately determined even in the `Final Theory’ by a choice from a large or continuous ensemble… the correct unification scheme will not allow calculation of [the masses of the proton and the up and down quarks] from first principles alone.” So these parameters have a large range of choices and a small life-permitting range and there is no good reason to expect a ‘Theory of Everything’ to force these masses to their current values. We should remember that even if this were the case, there would still be a fine-tuning argument based on what is metaphysically possible. Physicists would still be astounded at the coincidences: “Even if all apparently anthropic coincidences could be explained [in terms of a more fundamental theory], it would still be remarkable that the relationships dictated by physical theory happened also to be those propitious for life.[9]” Bernard Carr and Sir Martin Rees

Actually, grand unified field theories and other new more fundamental physics theories introduce new fine-tuning requirements. Most of these theories assume something called supersymmetry is true. However, if supersymmetry were true at our energy scales, there would be no life anywhere in the universe as Susskind has pointed out[10]. In this unconfirmed theory, every particle has a partner particle of the opposite type – bosons have partners that are fermions and vice versa. Thankfully, even if supersymmetry turns out to be true, it’s a broken symmetry at low-energies! Barnes also points out that the Grand Unified Theories provide “tightest anthropic bounds on the fine structure constant, associated with the decay of the proton into a positron and the requirement of grand unification below the Planck scale.[11]” So these new candidate theories do not eliminate fine-tuning.

If you’ve been following my fine-tuning blog series, I hope by now you see the incestuous nature of the inter-dependencies and inter-connections of finely-tuned parameters and how incredible it is that there is a solution to all of the concurrent equations that must satisfy multiple, entirely independent life-permitting constraints. Consider that if you have 10 linear equations and 10 “unknown” variables then there is usually at least 1 solution to all of the equations. This becomes increasingly unlikely is as you add non-linear terms or as you reduce the number of variables. Thus, if new physics reduces the number of variables (the fundamental constants) that makes it more surprising that a simultaneous solution exists to all of the life-permitting criteria!

Can the Multiverse Explain this Fine-Tuning?

Recall our discussion about how the multiverse, if it is to explain fine-tuning, predicts that the fine-tuning will be barely enough to be life-permitting. As physicist Paul Davies notes: “there is no a priori reason why the laws of physics should be more bio-friendly than is strictly necessary for observers to arise.” Davies also says that “the observed Universe is not minimally biophilic, and many scientists seem to think it is actually optimally biophilic.” I think he must be referring to the laws of physics and not necessarily all aspects of the universe being optimally biophilic.

Do we have indications from the fine-tuning of particle attributes that they are fine-tuned more than is strictly necessary to support life? Stephen Hawking seems to think so: “The summed quark masses seem roughly optimized for the existence of the largest number of stable nuclei.[12]” Many of these heavier elements are not essential to what would minimally count as a living observer but are important for technology and lead to a more bio-friendly universe. Multiverse theories generally entail new physics that predicts that protons decay. No one has yet seen such an event despite extensive attempts that allow us to compute a maximum possible proton decay rate. This decay rate turns out to be much greater than that predicted by the multiverse proposals. Nobel Prize-winner Frank Wilczek of MIT indicates that the lifetime of the proton is at least 10 orders of magnitude greater than necessary – this corresponds to a factor of ten billion.

Physicist Lee Smolin critiques multiverse theories because they fail to make predictions consistent with our universe. He notes that “there are constants that simply don’t have the values we would expect them to have if they were chosen by random distribution among a population of possibly true universes.[13]” Smolin points out the unexpected and unlikely relationship between quark and lepton masses. He further argues that under randomly varying laws, “some symmetries of elementary particles would be violated by the strong nuclear force much more than they are.[14]”

Another powerful example of fine-tuning that goes beyond what is strictly necessary for life can be seen in the properties of water. A 2011 article[15] from New Scientist highlighted research by scientists from Stanford and the Argonne National Lab:

“Water’s life-giving properties exist on a knife-edge. It turns out that life as we know it relies on a fortuitous, but incredibly delicate, balance of quantum forces. Water is one of the planet’s weirdest liquids, and many of its most bizarre features make it life-giving.” Consider just a few of the examples of the bio-friendly properties of water that are exceptional compared to other liquids:

Higher density as liquid than solid (ice floats)

– Prevents lakes from freezing bottom up

– Ice at top then acts as a much better insulator than water to minimize additional freezing

Very high heat capacity

– Moderates temperatures at global and organismal levels

Latent heat of evaporation by far higher than other substances

– Increased ability to cool organisms

– Water’s unusually high thermal conductivity for a liquid also aids in cooling

Unusually high surface tension

– Maximizes capillary action

Low viscosity increase rate of diffusion, recycling of nutrients globally, and allows tiny capillaries (3 micron, single-cell thick wall) to nourish muscles
Non-Newtonian fluid

– 2x increase in pressure leads to 3x rate of (blood) flow

Viscosity of ice maximizes glacial activity
Near universal solvent – great for transport within cells or recycling nutrients within an ecosystem

The article explains that fine-tuning was needed for water to have such properties: “computer simulations show that quantum mechanics nearly robbed water of these life-giving features… Water fortuitously has two quantum effects which cancel each other out… ” The article concludes: “We are used to the idea that the cosmos’s physical constants are fine-tuned for life. Now it seems water’s quantum forces can be added to this ‘just right’ list’.” The parameter at the most fundamental level that is finely-tuned is simply Planck’s constant since that affects the magnitude of the effects of Heisenberg’s Uncertainty Principle. However, recall that I mentioned previously that all of the force strengths have a term for Planck’s constant in them. Thus, Planck’s constant is independently highly constrained based on force strengths and yet this just happens to also result in water having all of these amazing and unusual properties that benefit life in a manner beyond what is explicable by multiverse theories.

An example of additional fine-tuning required under multiverse theories relates to the number of spatial dimensions. Theories that entail multiverses with differing parameters per universe generally predict additional spatial dimensions that have to be compactified if life is to exist because otherwise there would be neither stable atoms nor stable planetary orbits. A much more significant example of an additional fine-tuning is required by what seems to be the most popular multiverse theory, eternal inflation. I mentioned in an earlier blog but it’s worth repeating that Sean Carroll[16] and others have calculated that “inflation only occurs in a negligibly small fraction of cosmological histories, less than 10^-66,000,000.” Thus, the multiverse isn’t very successful at explaining these finely-tuned parameters and the multiverse itself requires fine-tuning. The hypothesis of design therefore better explains the totality of the physics data.

[1] Leonard Susskind. The Cosmic Landscape, p. 176.

[2] As I’ve previously pointed, John von Neumann proved that information storage and replication are necessary for any type of life since life is a self-replicating system.

[3] Stephen Hawking and Leonard Mlodinow. The Grand Design, p. 160

[4] Barnes, p. 42-44.

[5] Barnes, p.48.

[6]Susskind, p. 176.

[7] Susskind, p. 174-5.

[8] Barnes, p. 44.

[9] Carr and Rees, “The Anthropic Cosmological Principle and the Structure of the Physical World,” Nature 278 (1979): 612.

[10] Susskind, p. 250. (The partner of the electron, the so-called selectron, would ruin chemistry.)

[11] Barnes, Luke. The Fine-Tuning of the Universe for Intelligent Life. Publications of the Astronomical Society of Australia, p. 53. http://arxiv.org/abs/1112.4647

[12] Hawking and Mlodinow, p. 160.

[13] Lee Smolin. The Trouble with Physics: The Rise of String Theory, the Fall of a Science, and What Comes Next, p. 166.

[14] Smolin, p. 167

[15] Lisa Grossman. “Water’s quantum weirdness makes life possible.” New Scientist. 25 Oct, 2011. http://www.newscientist.com/article/mg21228354.900-waters-quantum-weirdness-makes-life-possible.html

[16]Carroll, Tam. Unitary Evolution and Cosmological Fine-Tuning. http://arxiv.org/abs/1007.1417v1

August 8, 2014/by J. Warner Wallace

The Wisdom Chronicle

Wisdom Chronicle

The Wisdom Chronicle is designed to bring nuggets of wisdom from the dozens of books I read every year. I endeavor to share the best of what I have gleaned. The determination of relevance lies with you. Blessings, Jim Whiddon

221. JUDGING RIGHTLY “Why is it that those who are the quickest to judge are often those in possession of the fewest facts?”

Excerpt From: Wooden, John. “Wooden: A Lifetime of Observations and Reflections On and Off the Court.”

222. ADVERSITY

“Looking back it seems to me,

All the grief that had to be

Left me when the pain was o’er

Stronger than I was before.”

—Unknown

223. PHYSICAL APPEARANCE Human self-image thrives on physical attractiveness, athletic ability, a worthwhile occupation. But, paradoxically, any of those desirable qualities may raise a barrier against the image of God, for virtually any quality that a person can rely on makes it more difficult for that person to rely on the spirit of God. The beautiful, the strong, the politically powerful, and the rich do not easily represent God’s image. Rather, God’s spirit shines most brightly through the frailty of the weak, the impotence of the poor, the deformity of the hunchback. Even as bodies are broken, God’s image can grow brighter.”

“I do not say that a Miss Universe or a handsome Olympian can never show forth the love and power of God, but I do believe that such a person is, in some ways, at a disadvantage. Talent, a pleasing physical appearance, and the adulation of crowds tend to shove aside the qualities of humility and selflessness and love that Christ demands of those who would bear his image.”

“Let not the wise man boast of his wisdom or the strong man boast of his strength or the rich man boast of his riches, but let him who boasts boast about this: that he understands and knows me, that I am the LORD, who exercises kindness, justice and righteousness on earth, for in these I delight (Jeremiah 9:23 – 24).”

Excerpt From: Yancey, Philip. “In His Image.”

224. LONG TERM SUCCESS “Amos Alonzo Stagg. He was coaching football at the University of Chicago when they were a national power. After one very successful year a reporter said, “Coach Stagg, it was a great year! A really great year.”

Coach Stagg said, “I won’t know for another twenty years or so whether you’re correct.”

He meant that it would take that long to see how the youngsters under his supervision turned out in life.”

Excerpt From: Wooden, John. “Wooden: A Lifetime of Observations and Reflections On and Off the Court.”

225. TRY THIS IN A MEETING “Answer someone who expresses doubt about your idea with “Okay, let’s tweak it.” Now focus the argument on revising your idea as if the group had already accepted it. This move is a form of concession—rhetorical jujitsu that uses your opponent’s moves to your advantage.”

Excerpt From: Heinrichs, Jay. “Thank You For Arguing, Revised and Updated Edition.”

226. GOD SHAPES US “And when each of us looks back at all the turns and folds God has allowed in our lives, I don’t think it looks like a series of folded-over mistakes and do-overs that have shaped our lives. Instead, I think we’ll conclude in the end that maybe we’re all a little like human origami and the more creases we have, the better.”

Excerpt From: Goff, Bob. “Love Does.”

227. THE FUTURE “What is that key component and central question?

It’s simply this: Will you, or will you not, trust God for your future?”

Excerpt From: Farrar, Steve. “True Courage.”

228. JUSTICE “Blessed is the nation whose God is The Lord. Indeed I tremble for my country when I ponder that God is just and His justice cannot sleep forever.”

— Thomas Jefferson

229. COURAGE When given an opportunity to deny Christ and save his life: “There can be no deliberation in a matter so sacred.”

— early Christian Cyprian

230. CULTURE CLASH “Fault lines have shifted. As they move, we move, which is why all manner of clash is left behind.

In the end, the absence of clash becomes as telling as clash itself. In 1977, the year Queen Elizabeth II celebrated twenty-five years on the British throne, the Sex Pistols—remember them?—marked the occasion with the release of their dumb, if nasty, punk anthem “God Save the Queen,” prompting what were still predictable clucks of outrage from defenders of the British institution.

Given these seemingly natural cultural enmities, a golden jubilee invite to, for example, drug-addled, bleep-mouthed Ozzy Osbourne—at the time riding reality-show-high—should have struck a culturally significant spark or two somewhere in the realm. But no. As the aged Keeper of the Stiff Upper Lip and retinue prepared to receive the aging Advocate of Wild Abandon and mates at her own gala affair, there was no discernible tut-tutting, not a single letter to the editor wondering what the country was coming to. In the end, no one noted anything amiss about an event that brought together a man who bites bats with a woman who has a royal taster.

Which goes to show the cultural revolution isn’t just over; it’s been forgotten entirely. This explains why, flashing forward to the 2004 Kennedy Center Honors in Washington, D.C., Billy Joel could celebrate Sir Elton John’s Lifetime Achievement Award by performing “The Bitch Is Back” for a black-tie crowd including President Bush, his White House cabinet, and a national television audience.

This was another transgressive moment of pomp and punkiness, a mix of cultivation and coarseness, but no one noticed the clash because there wasn’t any.”

Excerpt From: West, Diana. “The Death of the Grown-Up.”

August 4, 2014/by Jim Whiddon

Fine-Tuning of the Force Strengths to Permit Life

2. Does God Exist?, Philosophy of Science

“As we look out into the Universe and identify the many accidents of physics and astronomy that have worked together to our benefit, it almost seems as if the Universe must in some sense have known that we were coming.[1]” Physicist Freeman Dyson

In my previous blog, I discussed how numerous changes to the laws of physics would have resulted in a lifeless universe. I admitted that this was relatively modest evidence for my fine-tuning claim:

“In the set of possible physical laws, parameters and initial conditions, the subset that permits rational conscious life is very small.”

I say relatively modest because the evidence I cite in my blog about the fine-tuning of initial conditions is so powerful and the same I argue applies to the evidence I present in this blog. This blog examines how the constants governing the four fundamental forces of physics must be finely-tuned to support life. Refer to my previous blog for the qualitative aspects of these forces and how they have to be just right to permit life. I now focus on the quantitative constraints on the strengths of these forces if intelligent life is to plausibly exist anywhere the universe. First some background – physicists typically refer to coupling constants for those dimensionless constants[2] which represent the strength of each force. The strength of these forces ranges over about 40 orders of magnitude – that is to say that the strongest force is 10⁴⁰ times stronger than the weakest force. Thus, it would be surprising if the strengths of these forces must lie in narrow ranges to permit life – at least if the values were set at random such as would be the case in a universe without God. Let’s look at how sensitive these parameters are with respect to permitting life:

1) Strong nuclear force

This force is important for the existence of stable atoms beyond hydrogen. If the strong force were 50% weaker, no elements used by life would exist because protons couldn’t be held together in the nucleus. The strong nuclear force must exceed the strength of the electromagnetic force sufficiently to overcome the electromagnetic repulsion of positively charged protons. While learning chemistry would be much easier if only the first few elements existed in the periodic table, there would be no physical creatures around to learn it! If the strong force were about 50% stronger no hydrogen would be left over from nuclear fusion processes occurring in the early universe. Hydrogen plays a critical life-supporting role not only as a constituent of water but hydrogen-burning stars last 30 times longer than alternatives. This particular constraint may not make intelligent life impossible but life would certainly be much harder to originate if the available time were so limited and if neither water nor hydrocarbons existed.

Also, hydrogen-bonding is very important in biology for many reasons: information storage in DNA, antibody-antigen interaction, and for the secondary structure of proteins. Remember that parameters that seem beneficial for life but are more fine-tuned than is strictly necessary counts against a multiverse explanation of the fine-tuning because multiverse scenarios predict only what is minimally necessary for life.[3] An even tighter constraint is that if the strong force were more than about 2% stronger protons wouldn’t form from quarks – in which case no chemical elements would exist![4] If the strong force were 9% weaker, stars would be unable to synthesize any elements heavier than deuterium (which is heavy hydrogen).

2) Electromagnetic force

This force is responsible for chemistry and plays a critical role in stellar fusion which powers life. The electromagnetic force needs to be much weaker than the strong nuclear force for atoms to be stable – so that the radius of the electron orbit is much larger than the radius of the nucleus.[5] Unless the electromagnetic coupling constant (which represents its strength) is less than about 0.2, there would be no stable atoms because electrons orbiting the nucleus would have enough kinetic energetic to create electron-positron pairs which would then annihilate each other and produce photons. Additional examples of fine-tuning for this force strength will be described later in this blog.

3) Weak nuclear force

The weak force controls proton-proton fusion, a reaction 1,000,000,000,000,000,000 times slower than the nuclear reaction based on the strong nuclear force. Without this, “essentially all the matter in the universe would have been burned to helium before the first galaxies” were formed. Because the weak nuclear force is so much weaker than the strong nuclear force, a star can “burn its hydrogen gently for billions of years instead of blowing up like a bomb.[6]” I’ve previously described the negative ramifications for life if there were no hydrogen in the universe.

John Leslie points out several other ways in which the weak nuclear force is finely-tuned. “Had the weak force been appreciably stronger then the Big Bang’s nuclear burning would have proceeded past helium and all the way to iron. Fusion-powered stars would then be impossible.[7]”

Neutrinos interact only via the weak force and are just powerful enough to blast off outer layers of exploding stars but and just weak enough to pass through parts of the star to get there. The weak force also plays a role in fusing electrons and protons into neutrons during the core collapse of stars to keep the collapse proceeding until it becomes an exploding star (supernova). UK Astronomer Royal Sir Martin Rees estimated that a change in the strength of the weak nuclear force by about 1 part in at least 10,000 relative to the strength of the strong force would have prevented supernova explosions which allow heavier elements to find their way to planets.[8] Without these supernova explosions key heavy elements would be unavailable for life.

4) Gravitational force

Many physicists think that we’ll eventually discover a Grand Unified Theory, uniting gravity with the other 3 fundamental forces. For this reason Stanford physicist Leonard Susskind remarks that “the properties of gravity, especially its strength, could easily have been different. In fact, it is an unexplained miracle that gravity is as weak as it is.[9]” This probable underlying relationship leads to a natural expectation that gravity could be as strong as the strongest force. The strength of gravity is about 40 orders of magnitude weaker than the strong nuclear force. Based on this expectation that gravity can vary up to strong nuclear force strength, the level of fine-tuning required for life is pretty remarkable:

If gravity is weaker by 1 in 10³⁶, stars are unstable to degeneracy pressure (for small stars) or unstable to radiative pressure just expelling huge chunks of the star (for larger stars).
If gravity is stronger by 1 in 10⁴⁰, the universe is dominated by black holes not stars.
If gravity is weaker by 1 in 10³⁰, the largest planet that would avoid crushing effects of gravity on any large-brained creatures would have a radius of about 50 meters – which is not a good candidate for an ecosystem and the development/sustenance of intelligent life.

These are huge numbers that may be hard for most readers to visualize. Thus, consider the following analogy to help understand the improbability of 1 part in 10³⁶. Suppose one could make a sand pile encompassing all of Europe and Asia and up to 5 times the height of the moon.[10] Suppose one grain of sand is painted red and randomly placed somewhere within this pile. A blind-folded person then randomly selects one grain of sand from the pile. The odds that she would select that one red grain of sand are slightly better than the 1 in 10³⁶ odds of a life-permitting strength of the gravitational force based on just one of the above criteria.

Let’s explore a few more fine-tuning cases constraining multiple constants concurrently.

Long-Lived Stars

As I’ve discussed previously, stars play at least two key roles in making the universe life-permitting:

1) As a long-lived power source that helps life overcome the effects of the Second Law of Thermodynamics that would otherwise lead to an eventual state of disarray and equilibrium.

2) For synthesizing elements not created by the Big Bang (which is basically everything past beryllium).

We take the sun for granted as a long-lived stable source of power but note the lack of any comparable long-lived power source on earth as an indication that is not always the case. A star is basically a controlled nuclear explosion held together by gravity – that it can last so long requires a delicate balance of various physical parameters. Consider that the Sun outputs less energy per kilogram of its mass than a person does – without fine-tuning, stars would die out much sooner. Obviously the sun is still able to output enormous quantities of energy because it’s so huge! Another surprising aspect of the sun is that photons generally take at least several thousand years to travel from the sun‘s core to its surface through the ionized plasma.[11] There are significant constraints on the strength of gravity and electromagnetism if there are to be long-lived stars. Luke Barnes summarizes some of the key physics research in this arena:

“There is a window of opportunity for stars – too small and they won’t be able to ignite and sustain nuclear fusion at their cores, being supported against gravity by degeneracy rather than thermal pressure; too large and radiation pressure will dominate over thermal pressure, allowing unstable pulsations.[12]”

Barnes does some calculations based on the possibility that gravity could vary in strength up to the strength of the strong nuclear force and uses a uniform prior distribution of possible values for the gravitational coupling constant and the electromagnetic coupling constant. Using this approach, he computes that “the stable-star-permitting region occupies 10^–³⁸ of parameter space.” This is even less probable than my previous sand analogy!

Production of Both Carbon and Oxygen in Stars

One of the earliest examples of fine-tuning was discovered by astronomer Fred Hoyle with regard to the fine-tuning required to make both carbon and oxygen in stars. Three distinct coincidences are required to abundantly make both types of elements in stars. These restrictions impose a constraint of about 1 part in 250 on the relative strength of the strong force and the electromagnetic force in both directions. Actually a more recent study by Ekström[13] in 2010 indicated that a change of just 1 part in 10,000 in the electromagnetic coupling constant would have resulted in the inability of stars to synthesize both carbon and oxygen. Despite being an atheist Hoyle conceded:

“Some super-calculating intellect must have designed the properties of the carbon atom, otherwise the chance of my finding such an atom through the blind forces of nature would be utterly minuscule. A common sense interpretation of the facts suggests that a superintellect has monkeyed with physics, as well as with chemistry and biology, and that there are no blind forces worth speaking about in nature. The numbers one calculates from the facts seem to me so overwhelming as to put this conclusion almost beyond question.[14]”

Other Constraints among Force Strengths

For a more comprehensive examination of fine-tuning constraints, refer to Luke Barnes excellent review article that I’ve previously referenced. This review article is an excellent summary of a hundred or so physics articles, and in many cases references multiple articles per fine-tuning constraint. Barnes lists several additional constraints I haven’t mentioned and provides additional details. Just among constraints involving powers of these coupling constants, Barnes lists a half dozen or more cases. Usually the power involves just a squared term but it’s important to note that there are linear, quadratic and inverse relationships among the coupling constants. For example, the electromagnetic force strength is constrained in one way based on a linear constraint and in another way based on a quadratic constraint and in another way based on the inverse of the force strength relative to some other constant. It is remarkable that there is a life-permitting region that simultaneously satisfied these multifaceted constraints.

Also, since each coupling constant can be expressed in terms of more fundamental parameters such as Planck’s constant and the speed of light there are very tight constraints on those parameters as well – especially because of the constraints across different powers of the coupling constant. Thus, Planck’s constant is constrained in one way and the square of this constant is constrained based on a different life-permitting criterion – and likewise for the speed of light.

Moreover, there is a finely-tuned cosmological parameter, known as Q, which can be expressed in terms of various other parameters including coupling constants. In an equation derived by Max Tegmark and Martin Rees[15], there are the following powers on various coupling constants: -1, 16/7, 4/7. Also, there is a natural log of the electromagnetic coupling constant to the -2 power that is taken to the -16/9 power. Without the various contributions of coupling constants taken to the various powers, the value for this parameter Q would not have been life-permitting. Q represents the magnitude of variations in energy density in the early universe. If Q was larger than 10^-5 the universe would have consisted of too many black holes to be life-permitting. If Q were smaller than 10^-6 there would be gravitationally bound structures in the universe – no stars, no planets and therefore no life. See Barnes’s article on page 32 for more details on the fine-tuning of Q and its relationship to coupling constants.

Finely-Tuned Output of Stellar Radiation

Brandon Carter first discovered a remarkable relationship among the gravitational and electromagnetic coupling constants. If the 12^th power of the electromagnetic strength were not proportional to the gravitational coupling constant then the photons produced by stars would not be of the right energy level to interact with chemistry and thus to support photosynthesis. Note how sensitive a proportion has to be when it involves the 12^th power – a doubling of the electromagnetic force strength would have required an increase in the gravitational strength by a factor of 4096 in order to maintain the right proportion. Harnessing light energy through chemical means seems to be possible only in universes where this condition holds. If this is not strictly necessary for life, it might enter into the evidence against the multiverse in that it points to our universe being more finely-tuned than is strictly necessary.

Closing Thoughts

It’s important to note how the values of these constants must lie within narrow ranges to be life-permitting based on multiple, independent criteria! My next blog will provide additional examples of this “coincidence.” This multiplicity makes my fine-tuning claim more robust because even if most of these peer-reviewed articles were wrong about fine-tuning claims, there would still be enough cases left to show that life-permitting physics is rare among possibilities.

Also, the question arises as to the likelihood there would exist any value for a constant that could satisfy multiple finely-tuned life-permitting criteria? Why would the life-permitting regions necessarily overlap at a single value that could then permit life relative to all of the constraints? UT Austin philosopher Robert C. Koons argues that this points to a higher-order fine-tuning and thus to design:

“When the value of a single constant is constrained in more than one way, it would be very likely that these independent constraints put contradictory demands on the value of the constraint. By way of analogy, if I consider several algebraic equations, each with a single unknown, it would be very surprising if a single value satisfied all of the equations. Thus, it is surprising that a single range of values satisfies the various anthropic constraints simultaneously. Leslie argues that this higher-order coincidence suggests that the basic form of the laws of nature has itself been designed to make anthropic fine-tuning possible. In other words, Leslie argues that there is evidence of a higher-order fine-tuning.[16]”

This coincidence grows even more surprising when one goes beyond the sheer multiplicity of constraints and also analyzes how differing powers on the constants appear in equations expressing independent and unrelated life-permitting constraints. Why is it that a given strength of electromagnetism turns out to be just right for long-lived stars, atomic stability, proton stability, electron stability, the synthesis of carbon and oxygen, the energy of photons output by stars, and the magnitude of density fluctuations in the early universe? Even speculative multiverse theories do not explain this type of coincidence.

[1] John Barrow and Frank Tipler. The Anthropic Cosmological Principle, p. 318

[2] Actually, these are constants at current densities but in the early universe the 3 non-gravitational forces are thought to have been unified in the sense that at those energy levels all of the forces behaved in the same manner. Once we get beyond the first 1/100^th of a nanosecond of the universe though we can speak of these as being constants.

[3] For an explanation of this widely accepted principle, refer to my previous blog: http://crossexamined.org/god-or-multiverse.

[4] Walter Bradley. (He happened to be the head of an engineering department when I was at Texas A&M). http://www.leaderu.com/offices/bradley/docs/universe.html

[5] Luke Barnes. The Fine-Tuning of the Universe for Intelligent Life. Publications of the Astronomical Society of Australia, p. 42. (http://arxiv.org/abs/1112.4647)

[6] Freeman Dyson, Scientific American 225 (1971), p. 56.

[7] John Leslie. The Prerequisites of Life in Our Universe. http://www.leaderu.com/truth/3truth12.html

[8] Martin Rees, Phil. Trans. Roy. Soc. London A 310 (1983), p. 317.

[9] Leonard Susskind, Cosmic Landscape, p. 9.

[10] I know that this is physically unrealistic but this hypothetical analogy aids in visualizing the magnitude of the fine-tuning.

[11] NASA web site. http://image.gsfc.nasa.gov/poetry/ask/a11354.html

[12] Barnes, p. 30.

[13] Ekström S., et al., Astronomy and Astrophysics, p. 514.

[14] Fred Hoyle. Engineering and Science, 11/81, p8-12.

[15] Max Tegmark and Martin Rees The Astrophysical Journal (1998), p. 499, 526

[16] Robert C. Koons. Theism vs. the Many-Worlds Hypothesis. http://www.reasons.org/articles/theism-vs.-the-many-worlds-hypothesis

August 3, 2014/by J. Warner Wallace

Many Changes to the Laws of Physics Would be Life-Prohibiting

2. Does God Exist?, Philosophy of Science, Theology and Christian Apologetics

In my previous blog, I discussed how the initial conditions of our universe had to be extremely finely-tuned to support life of any kind anywhere in the universe. As part of my ongoing series on how fine-tuning provides evidence for the existence of God, I now turn to the laws of physics themselves. It turns out that life seems to require all 4 fundamental forces of physics. Let’s do a quick survey of some of the many ways that alternate physics could have been life-prohibiting:

1) Gravity is essential in the formation of stars and planets. As I discussed in a previous blog, life needs something like stars as a long-lived stable energy source. Also, as cosmologist Luke Barnes has pointed out: “if gravity were repulsive rather than attractive, then matter wouldn’t clump into complex structures. Remember: your density, thank gravity, is 10³⁰times greater than the average density of the universe.”

2) The strong nuclear force is necessary to hold together the protons and neutrons in the nucleus. Without this fundamental force, no atoms would exist beyond hydrogen and thus there would be no meaningful chemistry and thus no possibility for intelligent life. The positively charged protons in the nucleus repel each other but thankfully the strong nuclear force is sufficiently stronger than electromagnetic repulsion. If the strong force acted at long ranges like gravity or electromagnetism, then no atoms would exist because it would dominate over the other forces. Barnes notes that “any structures that formed would be uniform, spherical, undifferentiated lumps, of arbitrary size and incapable of complexity.[1]”

3) The electromagnetic force accounts for chemical bonding and for why electrons orbit the nucleus of atoms. Without chemistry, there is no plausible way to store and replicate information such as would be necessary for life. Light supplied by stars is also of critical importance to life in overcoming the tendency towards disorder, as dictated by the Second Law of Thermodynamics. Barnes points out that without electromagnetism, “all matter would be like dark matter, which can only form large, diffuse, roughly spherical haloes.[2]” Suppose like charges attracted and opposites repelled (in contrast with the behavior in our universe), there would be no atoms.

4) The weak nuclear force plays a key role during core-collapse supernova[3] in the expulsion of key heavier elements, making them available for life rather than just entombed forever in dying stars. Also, the weak force enables the key proton-proton reaction which powers stars in our universe. There is a clever paper by Harnik[4] that attempts to find a life-permitting universe without the weak force but only at the expense of a “judicious parameter adjustment.” See this discussion of the additional finely-tuned constants that were necessary to compensate for the lack of a weak force.[5] Also, some physicists think that the weak force is necessary for there to be matter in our universe.[6]

A region of star formation in a small nearby dwarf galaxy (N90) as captured by the Hubble telescope:

The existence of matter in our universe relies on some asymmetries in physics that are not yet precisely understood. Most physical reactions produce matter and antimatter in equal proportions and these products would simply annihilate each other upon contact, resulting in a matter-less (and therefore lifeless) universe consisting solely of radiation. We’re fortunate that the laws are such that this asymmetry produces a slight excess of matter over antimatter (about 1 part in ten billion)[7]! It would be premature to try to make a numerical claim that a constant has to be finely-tuned to permit this phenomenon but this unusual asymmetry provides yet another example of how different physics could have been catastrophic for life.

Another key physics principle that is critical for life is quantization. Values are defined as being ‘quantized’ if they can only take on discrete rather than continuous possibilities. Without quantized orbits electrons would be sucked into the nucleus and no chemistry would be possible. This quantization also leads to stable orbitals and consistent chemical properties. If electrons could orbit the nucleus anywhere such as is permissible for planets orbiting a star, then a given chemical element would have properties which are too variable for information storage of the type needed for intelligent life. Consider how the DNA in your genome would become cancerous within a day if its properties/information content were constantly varying. Also, consider how a breath of oxygen could conceivably become poisonous if its properties had no consistency.

Some other aspects of quantum mechanics are also very important to life. We need the Pauli Exclusion Principle so that all electrons don’t just reside in the lowest energy-level orbital. The multiple levels of orbitals contribute greatly to the richness and diversity of chemistry. Not all types of particles follow the Pauli Exclusion Principle – if electrons were bosons rather than fermions they wouldn’t be restricted by this principle. The Pauli Exclusion Principle coupled with the quantization of electron orbitals is responsible for giving matter its rigidity, which is important for the existence of stable structures. Moreover, without quantum mechanics, atoms would decay in about 10^-13 seconds as Earnshaw’s theorem demonstrates based on classical mechanics.

Physicist Leonard Susskind points out yet another way that physics could have been life-prohibiting:

‘The photon is very exceptional. It is the only elementary particle, other than the graviton, that has no mass… Were the photon mass even a tiny fraction of the electron mass, instead of being a long-range force, electric interactions would become short-range “flypaper forces,” totally incapable of holding on to the distant valence electrons. Atoms, molecules and life are entirely dependent on the curious fact that the photon has no mass.[8]’

The trend in physics is that the number of cases of fine-tuning is growing over time. For example, physicist Joel Primack recently discovered an important link between the existence of dark matter and galaxy formation. Primack showed that “galaxies form only at high peaks of the dark matter density.“ Galaxies are generally thought to be necessary for life because they are critical for star formation. Thus, even aspects of physics which might seem pointless, such as dark matter, turn out to play an important role in making the universe more bio-friendly. I’ve also referenced an article in a previous blog that discusses how black holes “may actually account for Earth’s existence and habitability.[9]”

Any one of these facts by itself might just be seen as fortunate coincidences but there are enough of them to provide at least modest support for my fine-tuning claim:

“In the set of possible physical laws, parameters and initial conditions, the subset that permits rational conscious life is very small.”

The support is not as strong as what I documented based on our universe’s initial conditions nor as strong as what I will document concerning the fine-tuning of the constants of nature but it adds to the overall case. Moreover, this evidence has some bearing in the consideration of the multiverse[10] as an explanation of fine-tuning because it deals with physics at the level that most multiverse proposals cannot explain. In most multiverse scenarios the laws of physics are the same – what changes are the constants in the equations representing those laws. If you want to explore more about various multiverse alternatives, here is one useful perspective that was referenced in comments of a previous blog. Max Tegmark has proposed what he calls a level 4 multiverse in which all mathematical possibilities are realized somewhere in the multiverse. If we lived in such a multiverse, Occam’s Razor would not be a fruitful heuristic and we wouldn’t have Nobel laureates[11] talking about how simple, elegant theories led them to discoveries. There would be infinitely more equations with lots of complicated terms and expressions than there would be simple equations with minimal terms. Colombia professor Peter Woit provides a powerful critique of Tegmark’s highly speculative metaphysical proposal. These multiverse scenarios in which fundamental laws are different are not widely accepted among physicists.

In summary, life needs all of the 4 fundamental forces of nature and several principles from quantum mechanics. These facts about the laws support my fine-tuning claim that life-permitting physics is rare among possibilities. Standford physicist Leonard Susskind summarizes the physics well:

“It is gradually becoming accepted, by many theoretical physicists, that the Laws of Physics may not only be variable but are almost always deadly. In a sense the laws of nature are like East Coast weather: tremendously variable, almost always awful, but on rare occasions, perfectly lovely.[12]”

[1] Barnes, Luke. The Fine-Tuning of the Universe for Intelligent Life. Publications of the Astronomical Society of Australia, p. 18. http://arxiv.org/abs/1112.4647

[2] Ibid., p, 18.

[3] A supernova is an exploding star and is the key way heavy elements are distributed throughout the universe.

[4]Harnik R., Kribs G., Perez G., 2006, Physical Review D, 74, 035006

[5]Barnes, p. 46-7.

[6] Fermilab website. DOE. http://lbne.fnal.gov/why-neutrinos.shtml

[7] Here is a website if you want to explore this further: http://abyss.uoregon.edu/~js/cosmo/lectures/lec22.html

[8] Susskind, Leonard. The Cosmic Landscape, p. 174-5.

[9] http://www.scientificamerican.com/article/how-black-holes-shape-galaxies-stars-planets-around-them/

[10] If you missed my other blogs and are wondering what a ‘multiverse’ is, a multiverse is simply a collection of universes. If there is a vast ensemble of other universes with widely varying laws this might be a candidate explanation of the fine-tuning. Here was my blog on that topic: http://crossexamined.org/god-or-multiverse/

[11] For example, Eugene Wigner’s famous essay on The Unreasonable Effectiveness of Mathematics in the Natural Sciences. https://www.dartmouth.edu/~matc/MathDrama/reading/Wigner.html. Also, see how Weinberg regards beauty as a guide to finding the correct physical theories: http://www.pbs.org/wgbh/nova/elegant/view-weinberg.html. Or refer to this essay for a historical review: http://www.huffingtonpost.com/david-h-bailey/why-mathematics-matters_b_4794617.html

[12] Susskind, p. 90.

August 2, 2014/by J. Warner Wallace

The Wisdom Chronicle

Wisdom Chronicle

211. HIRING PROCESS Any executive who starts out believing that he or she is a good judge of people is going to end up making the worst decisions. Medical educators say their greatest problem is the brilliant young physician who has a good eye. He has to learn not to depend on that alone but to go through the patient process of making a diagnosis; otherwise he kills people. An executive, too, has to learn not to depend on insight and knowledge of people but on a mundane, boring, and conscientious step-by-step process. Don’t hire people based on your instincts. Have a process in place to research and to test applicants thoroughly .”
Excerpt From: Peter F. Drucker. “The Daily Drucker.”
212. JESUS AS EDITOR “The worst chapter of your life does not have to be the last chapter if Jesus is your editor.” — Unknown
213. LOVE AND MARRIAGE “Have you ever wondered why when people get married, they promise to love each other until death? Think about it. Feelings change. You can’t promise to have a feeling. So if love is a feeling, the marriage vow makes no sense at all. But the vow does make sense because love is not a feeling. What is it, then? Love is a commitment of the will to the true good of another person. Of course, people who love each other usually do have strong feelings too, but you can have those feelings without having love. Love, let me repeat, is a commitment of the will to the true good of another person. Now the outward expression and seal of a commitment of the will is a binding promise. So the adult way to express love is to enter into a binding promise: marriage.”
Excerpt From: Budziszewski, J. “How to Stay Christian in College.”
214. LAWS AND MORALS “The Twenty-first Amendment repealed Prohibition in 1933, and alcohol sale and consumption went back to being local and state concerns. The debacle led millions of Evangelicals to drop out of politics for decades afterward. Prohibition reminds us of the dangers of using the federal government to enforce private morality. Still, our laws will always reflect, to some degree, our moral beliefs, our religious and cultural ideas.
At the same time, laws shape our morality. Scholars refer to this as the teaching function of law”
Excerpt From: James Robison & Jay W. Richards. “Indivisible.”
215. LIFE’S UNCERTAINTIES Four times in Ecclesiastes “11:1–6, Solomon reminds us of what we do not and cannot know:
• You do not know what evil will be on the earth.
• You do not know what is the way of the winds.
• You do not know the works of God.
• You do not know which will prosper.”
Excerpt From: Jeremiah, David. “Searching for Heaven on Earth.”
216. MAN’S PURPOSE “For many men, their primary mission in life is to build a successful career, provide for their families, and retire comfortably. That is what drives them, and that is the vision they pass on to their sons. But I think there is a much greater, nobler mission to pass on to boys.
Psalm 127: “Like arrows in the hand of a warrior, so are the children of one’s youth. How blessed is the man whose quiver is full of them” (verses 4–5).
This is powerful imagery. Think about what an arrow is created to do. Was it designed to stay in the quiver, comfortable and protected? No, it was made to be aimed and shot by a warrior at a target, to deliver a blow in battle.
Can you see the connection? Boys need to understand that they are not here on earth just to achieve worldly success and comfort. They’re here to strike a blow against evil, to make a mark on their world.”
Excerpt From: Rainey, Dennis. “Stepping Up.”
217. PROVIDENCE In 1937, Disney released the first full length animated motion picture, Snow White. The limited technology of the day required over 2 million individual detailed drawings be made with each one appearing a mere 1/24 of a second on screen. A movie goer could come and be impressed, but have no idea of the size and scope of the task which was required to bring the project to the viewing public.
The same can be considered when it comes to our Father in Heaven. We cannot imagine the scope and detail with which He provides for us throughout our lives “behind the scene.”
— Chris Seidman
218. MANHOOD “A man’s willingness to offer up his life for his wife or for anybody else who happens to need him is not the end of everything. It is only the end of himself. He who is fully a man has relinquished his right to himself.
— ELISABETH ELLIOT, “The Mark of a Man”
219. LIBERTY UNCHECKED “John Flavel made a penetrating observation over three hundred years ago, and it applies to our day:
Upon their king’s death, it was the Persians’ custom (I am not saying it was laudable) to grant everyone liberty for five days to do whatever they wanted.
The unbridled lust was so great that it made the people long and pray for the installment of the next king.
When everyone has unchecked liberty, all hell breaks loose. It’s called anarchy, and it is demonic. And there is nothing like unchecked liberty to make people long for a good king and good laws.
When you are the king of your own life, you give yourself permission to do anything you want—and that’s when all hell breaks loose.”
Excerpt From: Farrar, Steve. “Real Valor.”
220. LIFE “The key to life is not its length but its depth. It’s not how many days we live, but how we live our days.” — Jim Denison

July 28, 2014/by Jim Whiddon

Fine-Tuning of Initial Conditions to Support Life

2. Does God Exist?

This is the sixth blog in my series on fine-tuning. Here are the previous blogs if you missed them:

Intro/Philosophical Background

If You Don’t Want God, You Better Have a Multiverse!

How Does Fine-Tuning Provide Evidence for God?

Objections

Mistaken Objections that Seek to Trivialize Fine-Tuning

Important Objections in the Fine-Tuning Debate

But We Can’t Even Define Life

We’re finally ready to start exploring the fine-tuning data itself. A logical starting point is the initial conditions of our universe – are those which permit life rare among possibilities?

1) Energy-Density is Finely-Tuned

The amount of matter (or more precisely energy density) in our universe at the Big Bang turns out to be finely-tuned to about 1 part in 10⁵⁵. In other words, to get a life-permitting universe the amount of mass would have to be set to a precision of 55 decimal places. This fine-tuning arises because of the sensitivity to the initial conditions of the universe – the life-permitting density now is certainly much more flexible! If the initial energy density would have been slightly larger, gravity would have quickly slowed the expansion and then caused the universe to collapse too quickly for life to form. Conversely if the density were a tad smaller, the universe would have expanded too quickly for galaxies, stars, or planets to form. I argued in my previous blog that it’s implausible to expect life to originate without a long-lived, stable energy source such as a star. Thus, life would not be possible unless the density were just right – if you added or subtracted even just your own mass[1] to that of the universe this would have been catastrophic!

There is, however, a potential dynamical solution to this problem based on a rapid early expansion of the universe known as cosmic inflation. In this blog, I’ll be relying primarily on the most comprehensive review article on fine-tuning in the peer-reviewed literature – this one by Luke Barnes. I’ve referenced it previously and I’m hoping if I reference it enough I’ll get tech-savvy readers to check it out! It may be too technical for some readers and my blog can be viewed as just an attempt at explaining some highlights to non-physicists and tying it into my metaphysical hypothesis that God is the best explanation of the fine-tuning. So let’s look at what Luke Barnes has to say about inflation as a solution to the energy density problem. He points out 6 aspects of inflation that would have to be properly setup, some of which turn out to require fine-tuning. One significant aspect is that the inflation must last for the proper amount of time – inflation is posited to have been an extremely brief but hyper-fast expansion of the early universe. If inflation had lasted a fraction of a nanosecond longer, the entire universe would have been merely a thin hydrogen soup, unsuitable for life. Barnes cites an article by Max Tegmark of MIT that indicates that in a best case scenario about 1 in 1000 inflationary universes would avoid lasting too long. The biggest issue though seems to be that for inflation to start, it needs a very special/rare state of an extremely smooth energy density. Several articles make this point – consider Sean Carroll’s article:

“It is therefore a necessary (although not sufficient) condition for inflation to occur that perturbations be small at early times. . . . the fraction of realistic cosmologies that are eligible for inflation is therefore … 10^-66,000,000.”

Barnes also explains why, even if inflation solves this fine-tuning problem, one should not expect new physics discoveries to do away with other cases of fine-tuning: “Inflation thus represents a very special case… This is not true of the vast majority of fine-tuning cases. There is no known physical scale waiting in the life-permitting range of the quark masses, fundamental force strengths or the dimensionality of spacetime. There can be no inflation-like dynamical solution to these fine-tuning problems because dynamical processes are blind to the requirements of intelligent life. What if, unbeknownst to us, there was such a fundamental parameter? It would need to fall into the life-permitting range. As such, we would be solving a fine-tuning problem by creating at least one more. And we would also need to posit a physical process able to dynamically drive the value of the quantity in our universe toward the new physical parameter.”

2) Initial Conditions in a Very Low Entropy State

Even if inflation somehow could solve the energy density problem and scientists are mistaken that inflation requires its own fine-tuning, inflation doesn’t solve the problem with this next type of fine-tuning which relates to the universe’s initial entropy. What is entropy? Entropy represents the amount of disorder in a system. Thus, a high entropy state is highly disordered – think of a messy teenager’s room. Our universe began in an incredibly low entropy state. A more precision definition of entropy is that it represents the number of microscopic states that are macroscopically indistinguishable. An egg has higher entropy once broken because you’re “opening” up many more ways to arrange the molecules. There are more ways of arranging molecules that would still be deemed an omelet than there are ways to arrange the particles in an unbroken egg in where certain molecules are confined to subsets of the space in the egg – such as a membrane or the yolk. Entropy is thus closely associated with probability. If one is randomly arranging molecules, it’s much more likely to choose a high entropy state than a low entropy state. Randomly arranged molecules in an egg would much more likely look like an omelet that an unbroken egg.

Entropy can also be thought of as the amount of usable energy. Over time the usable energy decreases. This principle is known as the Second Law of Thermodynamics, which says that in a closed system the entropy on average increases until a state of equilibrium is reached. Thus, the Second Law predicts that our universe will eventually reach such a state of equilibrium or “heat death” in which nothing interesting happens. All life will die off long before such a state is reached. Life relies on usable energy from the environment.

It turns out that nearly all arrangements of particles in the early universe would have resulted in a lifeless universe of black holes. Tiny inconsistences in the particle arrangements would be acted on by gravity to grow in size. A positive feedback results since the clumps of particles have an even greater gravitational force on nearby particles. Penrose’s analysis shows that in the incredibly dense early universe, most arrangements of particles would have resulted basically in nothing but black holes. Life certainly can’t exist in such a universe because there would be no way to have self-replicating information systems. Possibly the brightest objects in the universe are quasars, which release radiation as bright as some galaxies due to matter falling into a supermassive black hole. The rotation rates near black holes and the extremely high-energy photons would disrupt information storage, a prerequisite for life[2].

Artist’s conception of a black hole. Credit: European Space Agency, NASA, and Felix Mirabel (the French Atomic Energy Commission & the Institute for Astronomy and Space Physics/Conicet of Argentina)

Oxford physicist Roger Penrose is the first scientist to quantify the fine-tuning necessary to have a low entropy universe to avoid such catastrophes. “In order to produce a universe resembling the one in which we live, the Creator would have to aim for an absurdly tiny volume of the phase space of possible universes, about 1/₁₀10¹²³ [3].” This number is incomprehensibly small – it represents 1 chance in 10 to the power of (10 to the power of 123). Writing this number in ordinal notational would require more zeroes than the number of subatomic particles in the observable universe, 10¹²³zeroes vs. about 10⁹² particles. Under the assumption of atheism, the particles in our universe would have been arranged randomly or at least not with respect to future implications for intelligent life. Nearly all such arrangements would not have been life-permitting so this fine-tuning evidence favors theism over atheism. We have a large but finite number of possible original states and rely on well-established statistical mechanics to assess the relevant probability.[4]

In a comment on one of in my earlier blogs, someone suggested that perhaps the universe is fine-tuned for black holes rather than life. The incredibly low entropy state of the initial conditions shows, however, that the exact opposite is true – fine-tuning was required to avoid excessive black holes! This fact about the initial conditions also calls into question Smolin’s proposed scenario that universes with differing physical constants might be birthed out of black holes. Smolin suggests the possibility of an almost Darwinian concept in which universes that produce more black holes therefore more baby universes than those which don’t. But if our universe requires statistically miraculous initial conditions to be life-permitting by avoiding excessive black holes, universes evolving to maximize black hole production would be unlikely to lead to life! (Even if the evolution of universes were possible)

Furthermore, the skeptic who thinks that black holes suggest a purposeless universe should consider that black holes can, in moderation and kept at distance, be helpful for life. While a universe comprised of mostly black holes would be life-prohibiting, having a large black hole at the center of a galaxy is actually quite helpful for life. Here is a Scientific American article that documents the benefits of Black Holes for life – it summarizes: “the matter-eating beast at the center of the Milky Way may actually account for Earth’s existence and habitability.”

Does inflation explain the low entropy of the early universe?

Here is how Sean Carroll answers this question: “Not by itself, no. To get inflation to start requires even lower-entropy initial conditions than those implied by the conventional Big Bang model. Inflation just makes the problem harder[5].” Penrose also has harsh words for inflation as an explanation of the low entropy state of the initial universe[6].

Barnes calls inflation a “cane toad solution” for the entropy fine-tuning. Cane toads were brought into Australia from Hawaii starting in 1935 to eat beetles threatening the sugarcane fields. With no natural predators in Australia this strategy was disastrous as these poisonous toads multiplied greatly and wreaked havoc on native species and the ecosystem in general. Thus, Barnes is saying that inflation makes this fine-tuning problem worse. None of this is to say that some version of inflationary theory isn’t true just that it doesn’t help this fine-tuning issue.

How well could a multiverse explain this evidence?

This is a key question to consider as we explore the fine-tuning evidence. If some features seem overly fine-tuned, this would be unexpected if our universe was simply a life-permitting universe randomly selected from a vast ensemble of other universes with other constants or initial conditions. A multiverse explanation for the fine-tuning of the low entropy fails miserably because this universe does seem to be finely-tuned much more than would be minimally necessary. As Penrose says: “We can get the solar system and all inhabitants for much less odds: 1 in ₁₀10⁶⁰ .. These world ensemble hypotheses are worse than useless in explaining the anthropic fine-tuning of the universe.” In other words, Penrose argues that it would be more likely to just have the particles arranged in initial conditions such that you already have pre-formed intelligent life in a single solar system than to have such a large universe as ours in a low-entropy state that could eventually lead to intelligent life.

Even atheist Sean Carroll admits[7] that a multiverse explanation fails for this fine-tuning. First, he agrees with the widely-accepted principle I referenced above: “anthropically-selected parameters should be of the same order of magnitude as the largest value compatible with the existence of life.” He then explicitly agrees that the multiverse cannot by itself explain this particular fine-tuning and quotes Penrose’s numbers. “An example of fine‐tuning well beyond anthropic constraints is the initial state of the universe, often characterized in terms of its extremely low entropy… The entropy didn’t need to be nearly that low in order for life to come into existence. One way of thinking about this is to note that we certainly don’t need a hundred billion other galaxies in the universe in order for life to arise here on Earth; our single galaxy would have been fine, or for that matter a single solar system.” As an atheist he doesn’t view this as an insuperable problem, holding out hope that new physics could somehow explain this low entropy. Carroll indicates that he can’t think of any reason why God would fine-tune the universe more than is necessary, apparently not giving thought to the possibility that God might want to leave evidence that He setup the physics of the universe – evidence of the type that even an infinite multiverse cannot plausibly explain!

Is this evidence for God?

Even if this evidence points to design, why think that God is necessarily the designer?

If this is your perspective, please help remove the stigma on intelligent design so this type of evidence can be fairly evaluated. Also, note that this perspective affirms the claim of leading Intelligent Design advocates that design by itself does not necessarily prove God.

For this particular design evidence, however, I argue that we have reasons for thinking that only a supernatural being could setup these initial conditions in this way. Is it in principle physically possible for a being limited by the laws of physics to setup the initial conditions of our Big Bang? The Heisenberg Uncertainty principle limits our ability to even have knowledge of both position and momentum of particles beyond a certain scale – and it’s even more challenging to think about how so many particles might have their locations and velocities adjusted. The early universe would have been so small that the limits imposed by this physical principle would seem to prevent any physically-limited agent from making the necessary adjustments to the particles or even having knowledge to determine necessary adjustments. Moreover, even those who advocate a naturalistic cause to the Big Bang often admit that the Big Bang represents a spacetime boundary. Many theorists consider our universe to be a causally disconnected region of spacetime – which would make it impossible for a physically limited being residing in a different physical region from affecting anything in this new region of spacetime.
Thus, a supernatural designer seems more plausible than a natural designer. Also, if fine-tuning is required to bring about intelligent life, how did the first natural designers arise?

Does God Have to be Fine-tuned?

To me this seems like asking: “does an uncreated being depend on rare events or rare settings of physical parameters for His existence?” By definition God doesn’t rely on anything for his existence – this is the concept of a necessary being. If the concept of a necessary being seems implausible, I warn you that you might already believe premises that by the rules of logic would entail the existence of a necessary being. I invite you to explore that possibility in this online quiz.

[1] The universe is estimated to contain at least 10^80 atoms – here is one estimate of 10^53 kg: http://en.wikipedia.org/wiki/Observable_universe Anyone old enough to read this blog must weigh at least say 10 kg so this seems to be a safe estimate even after accounting for other forms of matter energy not included in the above mass.

[2] Refer to my previous blog for further justification: http://crossexamined.org/cant-even-define-life/

[3] Penrose, The Emperor’s New Mind, p. 343. He also makes the same argument in Road to Reality on p. 730.

[4] In addition, the entropy equation for a black hole, first developed by Bekenstein and Hawking, is involved in these computations. This equation is widely accepted by the physics community and I’ve read articles by those who believe in string theory and those who believe in loop quantum gravity arguing for their theories by pointing to how they can derive this same equation in their flavor of quantum gravity.

[5] Sean Carroll, http://preposterousuniverse.com/eternitytohere/faq.html

[6] Penrose says in Road to Reality, p. 755: “Indeed, it is fundamentally misconceived to explain why the universe is special in any particular respect by appealing to a thermalization process [such as inflation]. For, if the thermalization is actually doing anything (such as making temperatures in different regions more equal than they were before), then it represents a definite increasing of entropy. Thus, the universe would have had to be more special before the thermalization than after. This only serves to increase whatever difficulty we might have had previously in trying to come to terms with the initial extraordinarily special nature of the universe. . . . invoking arguments from thermalization, to address this particular problem [of the specialness of the universe], is worse than useless!” A couple of pages later Penrose also writes that “the point is that whether or not we actually have inflation, the physical possibility of an inflationary period is of no use whatever in attempts to ensure that evolution from a generic singularity will lead to a uniform (or spatially flat) universe.”

[7] Carroll, Does the Universe Need God? The Blackwell Companion to Science and Christianity. A copy is available online at http://preposterousuniverse.com/writings/dtung/.

July 21, 2014/by J. Warner Wallace

The Wisdon Chronicle

Wisdom Chronicle

The Wisdom Chronicle is designed to bring nuggets of wisdom from the dozens of books I read every year in all genres. Each week, I endeavor to share the best of what I have gleaned. The determination of relevance lies with you. Blessings, Jim Whiddon

201. CONSTANT LEARNING “Know that when you are through learning, you are through.”
Excerpt From: Wooden, John. “Wooden: A Lifetime of Observations and Reflections On and Off the Court.”
202. BEN FRANKLIN’S VIRTUES
“Ben Franklin’s 13 Virtues
1. Temperance: Eat not to dullness and drink not to elevation.
2. Silence: Speak not but what may benefit others or yourself. Avoid trifling
conversation.
3. Order: Let all your things have their places. Let each part of your business
have its time.
4. Resolution: Resolve to perform what you ought. Perform without fail what you
resolve.
5. Frugality: Make no expense but to do good to others or yourself: that is,
waste nothing.
6. Industry: Lose no time. Be always employed in something useful. Cut off all
unnecessary actions.
7. Sincerity: Use no hurtful deceit. Think innocently and justly; and, if you
speak, speak accordingly.
8. Justice: Wrong none, by doing injuries or omitting the benefits that are your
duty.
9. Moderation: Avoid extremes. Forbear resenting injuries so much as you think
they deserve.
10. Cleanliness: Tolerate no uncleanness in body, clothes, or habitation.
11. Chastity: Rarely use venery but for health or offspring; never to dullness,
weakness, or the injury of your own or another’s peace or reputation.
12. Tranquility: Be not disturbed at trifles, or at accidents common or
unavoidable.
13. Humility: Imitate Jesus.
Excerpt From: Jim Stovall & Tim Maurer. “The Ultimate Financial Plan.”
203. HOLOCAUST “We’ve all heard of the yellow triangles the Jews were forced to wear for identification. Do you know the other colors that were used? Brown triangles identified gypsies and those of Roman descent. Purple triangles were worn by Jehovah’s Witnesses, Catholic priests, and Christian leaders who ran afoul of the government. Purple badges. Red and pink and brown. Blue and black. All worn by mothers and fathers and children who were not the first to be selected for the camps. Their badges were worn—their fates altered—well after they got a good look at the yellow ones.”
Excerpt From: Andrews, Andy. “How Do You Kill 11 Million People?.”
204. BLOOD “A speck of blood the size of this letter “o” contains 5,000,000 red cells, 300,000 platelets and 7,000 white cells. The fluid is actually an ocean stocked with living matter. Red cells alone, if removed from a single person and laid side by side, would carpet an area of 3,500 square yards.” “After a person spends a few months in the rarefied atmosphere of Colorado’s mountains, up to ten million red cells will fill each drop of blood, compensating for the thinner air. The pell-mell journey, even to the extremity of the big toe, lasts a mere twenty
seconds. An average red cell endures the cycle of loading, unloading, and jostling through the body for a half million round trips over four months. In one final journey, to the spleen, the battered cell is stripped bare by scavenger cells and recycled into new cells. Three hundred billion such red cells die and are replaced every day, leaving behind various parts to reincarnate in a hair follicle or a taste bud.*”
“The brain, master of the body, can survive intact only five minutes without replenishment.”
Excerpt From: Yancey, Philip. “In His Image.”
205. REPUTATION “There is no lost and found that you can visit to get your reputation back. Don’t let go of it.”
Excerpt From: David Avrin & Joe Calloway. “It’s Not Who You Know — It’s Who Knows You!.”
206. LIFE CHANGES “At times I’m struck by how strange it is that the same person [me] who has gone through so many life changes over the years can believe in this God who is still the same because He never changes.”
Excerpt From: Goff, Bob. “Love Does.”
207. FUNERALS “More lies are told at funerals than at any other occasion. They are forced out as the silent deceptions of a man’s character are finally dealt with at his memorial service. People spend lifetimes covering or ignoring the truth of who they are. Friends and family, who spent their lives playing along with the deception while they were alive, stick to the beloved’s script in the end.
In the moment of a funeral, the description bears almost no similarity to the actual people memorialized. Mourners flip the funeral program over to make sure they’re in the right service. If we were half the people in life others will say we were at our funerals we might have lives that don’t require such edits. It’s bizarre type of courtesy paid to the bereaved. [But] there’s nothing so powerful as a life that speaks for itself. A life that is its own benediction. A life that is a translation of integrity. More than once I’ve thanked the deceased publicly for not forcing me to make things up at the end of their lives. You can’t rewrite the endings anyway. You might ignore them out of civility, but you can’t fix them. The more consistent the life, the easier the funeral is to preach. The best funeral preaches itself.
Excerpt From: Byron Forrest Yawn. “What Every Man Wishes His Father Had Told Him.”
208. GOD’S POLITICAL PARTY? “We exist to serve God. He doesn’t exist to serve us. No country, no political party, and no political ideology can own Him. He’s the boss.”
Excerpt From: Budziszewski, J. “How to Stay Christian in College.”
209. INFLUENCE “In order to learn about influence we must leave the comfort of models, linear sequences, and step-by-step recipes. The magic of influence is less in what we say and more in how we say it and who we are.”
Excerpt From: Simmons, Annette. “The Story Factor.”
210. HUMILITY Benjamin Franklin once said, “To be humble to superiors is duty, to equals courtesy, and to inferiors nobleness.”

July 21, 2014/by Jim Whiddon

Is Atheism a lack of belief in God?

Atheism, Theology and Christian Apologetics

It’s been fashionable lately for atheists to claim that atheism is “a lack a belief in God.” So when a theist comes along and says that atheists can’t support their worldview, some atheists will say something like, “Oh, we really don’t have a worldview. We just lack a belief in God. Since we’re not making any positive claims about the world, we don’t have any burden of proof to support atheism. We just find the arguments for God to be lacking.”

What’s lacking are good reasons to believe this new definition.

First, if atheism is merely a lack of belief in God, then atheism is just a claim about the atheist’s state of mind, not a claim about God’s existence. The “atheist” is simply saying, “I’m not psychologically convinced that God exists.” So what? That offers no evidence for or against God. Most people lack a belief in unguided evolution, yet no atheist would say that shows evolution is false.

Second, if atheism is merely a lack of belief in God, then rocks, trees, and outhouses are all “atheists” because they too lack a belief in God. It doesn’t take any brains to “lack a belief” in something. A true atheist believes that there is no God.

Third, most atheists don’t merely “lack a belief in God because they are constantly trying to explain the world by offering supposed alternatives to God. Atheists write book after book insisting that God is out of a job because of quantum theory, multiple universes, and evolution. While none of those atheistic arguments succeed in proving there is no God, they do prove that atheists don’t merely lack a belief in God — they believe in certain theories to explain reality without God.

They believe in those theories because atheism is a worldview with beliefs just as much as theism is a worldview with beliefs. (A “worldview” is a set of beliefs about the big questions in life such as: What is an ultimate reality? Who are we? What’s the meaning of life? How should we live? What’s our destiny? etc.) To claim that atheism is not a worldview is like saying anarchy is not really a political position. As Bo Jinn observes, “An anarchist might say that he simply ‘rejects politics,’ but he is still confronted with the inescapable problem of how human society is to organize itself, whether he likes the idea of someone being in charge or not.”

Likewise, atheists can say they just “reject God” but they are still confronted with the inescapable problem of how to explain ultimate reality. Just as anarchists affirm the positive belief that anarchy is the best way to organize society, atheists affirm the positive belief that atheistic materialism is the best way to explain ultimate reality.

In other words, atheists don’t “lack a belief” in materialism. They are not skeptical of materialism — they think it’s true! As Phillip Johnson said, “He who is a skeptic in one set of beliefs is a true believer in another set of beliefs.” Lacking a belief in God doesn’t automatically establish materialism any more than lacking a belief in atheism automatically establishes Christianity. No atheist would say that a Christian has made a good case because he “lacks a belief” in materialism!

Everyone has the burden of proof to support his or her position. Atheists must make a positive case that only material things exist. That’s why instead of debating “Does God exist?” I prefer to debate the question “What better explains reality: atheism or theism?” Then it’s obvious that both debaters have the burden of proof to support their position. Atheists can’t just identify what they think are deficiencies in theism. They must make a compelling case that everything has been caused by materials and consists only of materials, including:

• The beginning of the universe
• The fine-tuning of the universe
• The laws of nature
• The laws of logic
• The laws of mathematics
• Information (genetic code)
• Life
• Mind and consciousness
• Free will
• Objective morality
• Evil

It’s rare to find an atheist attempting to explain more than one or two of these things materially. How could they? How can laws be materials? The new atheists must provide reasons to support their belief that materialism is true. Simply lacking a belief in God doesn’t prove their worldview.

Finally, the “I merely lack a belief in God” definition leads to a contradictory result. As Dr. Richard Howe points out, “This definition of atheism entails the quirky conclusion that atheism is logically compatible with theism.” Here’s why: If lacking a belief in God is the definition of “atheism” — and not “there is no God” — then “atheism” is true even if God really exists. How is that reasonable?

We shouldn’t allow atheists to hide behind that lacking definition. A true atheist is someone who believes there is no God. And atheists have the burden of proof to show how materialism is true and reality can be explained without God.

Dr. Frank Turek (D.Min.) is an award-winning author and frequent college speaker who hosts a weekly TV show on DirectTV and a radio program that airs on 186 stations around the nation. His books include I Don’t Have Enough Faith to be an Atheist and Stealing from God: Why atheists need God to make their case.

July 19, 2014/by Frank Turek

But We Can’t Even Define Life

2. Does God Exist?, Philosophy of Science

In my previous blog I addressed some important issues in making the case that fine-tuning supports theism over atheism. Today I want to look at the objection against fine-tuning that says we can’t assess fine-tuning claims because we can’t even define ‘life’ – or put another way: “fine-tuning claims don’t properly account for other possible life forms.” It has proven surprisingly hard for scientists to agree upon a definition for life. This uncertainty, however, hasn’t prevented biologists from making inferences about life nor has it kept physicists from writing numerous articles claiming that certain changes to physical constants would have resulted in a lifeless universe. In most cases, the inference to a lifeless universe is based upon severe catastrophes such as:

A very short-lived universe
No stable atoms
No chemistry
No long-lived sources of energy (such as stars)

It seems plausible that in these situations no life could arise of the kind that could evolve into intelligent, rational creatures. Many fine-tuning constraints involve multiple life-permitting criteria so that even if one of them was incorrect, there would still be other constraints on the life-permitting range of values based on different life-permitting criteria. John Leslie affirms that “many of the fundamental constants have to take the values they do for several independent reasons.” Moreover, even if half of the fine-tuning claims were mistaken there would still be a sufficient number of finely-tuned parameters to conclude that life-permitting universes are rare among possibilities. My fine-tuning claim is therefore robust since it doesn’t rely on all physicists’ claims being true – here it is again:

In the set of possible physical laws, parameters and initial conditions, the subset that permits rational conscious life is very small.

If some peer-reviewed articles are in error, there might be other articles defining other constraints or at least there would be enough remaining evidence to conclude that the life-permitting universes are rare among possibilities. But let’s look in detail at what is necessary for life according to scientists.

What are some essential attributes of any plausible life form?

Self-replicating

Any life form that could evolve to possess intelligence would have to include a self-replicating system. John von Neumann showed that any self-replicator requires certain features such as information storage and processing. Any information storage system would need to be comprised of reasonably stable entities. A star, for example, is a hot plasma of charged particles in rapidly changing configurations and thus is deemed implausible to store information needed to originate and sustain life. Also, in the near vacuum of space there are so few particles interacting that there is no plausible way to replicate enough information for complex life.

Non-trivial information content

As origin of life researcher Stuart Kauffman has noted: “all living things seem to have a minimal complexity below which it is impossible to go.” One theoretical estimate for the amount of information for the simplest possible life form is 113,000 base pairs.[1] Any life form is likely to require polymers of some type to serve as building blocks that can be replicated. There are multiple ways in which a lack of finely-tuned parameters could have prevented the formation of any atoms beyond hydrogen. In this scenario, there would be no polymers and indeed no chemical compounds except for H₂. It is implausible to think that if only hydrogen ever existed in the universe that we would have intelligent life or so many physicists have argued.

Preservation of information content during replication

We also have some indications from our own planet of the importance of high fidelity information replication. The canonical genetic code that provides the mapping from RNA codons to amino acids used on our planet is highly optimized and arose early in life’s history[2] (else it wouldn’t be as universal.) Biologists interpret this as evidence of the importance of minimizing errors during translation and replication. The ability to preserve information is therefore recognized as being highly important for life.

Ability to harness energy from environment

Life must be able to harness energy from the environment or else the Second Law of Thermodynamics would pose an insurmountable hurdle. A long-lived stable energy source such as a star would therefore be required.

These same constraints and additional ones are described as prerequisites for life in an important article[3] in the Proceedings of the National Academy of Sciences (PNAS) that explains the attributes of alternate life forms that might eventually be found elsewhere in the universe. This article serves to confirm that the physics literature is making generous assumptions about what could be life-permitting. Here are some key points of the article with my comments provided after the quotations:

“It is predictable that life, wherever we encounter it, will be composed of macromolecules.” I agree – information and storage would most likely require polymers of some type.

“Only two of the natural atoms, carbon and silicon, are known to serve as the backbones of molecules sufficiently large to carry biological information.” I think that most physicists writing about fine-tuning are open to more alternatives than this article but the article raises some important points about the unique suitability of carbon:

Carbon “unlike silicon … can readily engage in the formation of chemical bonds with many other atoms, thereby allowing for the chemical versatility required to conduct the reactions of biological metabolism and propagation. … Silicon, in contrast, interacts with only a few other atoms, and the large silicon molecules are monotonous compared with the combinatorial universe of organic macromolecules”

“Life also must capture energy and transform that energy into the chemistry of replication. The electronic properties of carbon, unlike silicon, readily allow the formation of double or even triple bonds with other atoms.”

“It is critical that organic reactions, in contrast to silicon-based reactions, are broadly amenable to aqueous conditions. Several of its properties indicate that water is likely to be the milieu for life anywhere in the universe.”

“Life that depends only on chemical energy inevitably will fail as resources diminish and cannot be renewed.” This agrees with my point about needing a stable, long-term energy source to overcome the Second Law of Thermodynamics.

“Temperature is a critical factor for life. Temperatures must be sufficiently high that reactions can occur, but not so high that that complex and relatively fragile biomolecules are destroyed. Moreover, because life probably depends universally on water, the temperature must be in a range for water to have the properties necessary for solute transfer.” Again I think that the physics literature is more open-minded in this aspect but certainly at some point it becomes too hot or too cold to either reliably store information or to have enough energy to replicate it.

But Does Life Have to be Carbon-Based Life?

My fine-tuning claim and that by prominent advocates such as Luke Barnes don’t presuppose that any life form would have to be carbon-based – it’s much more general than that. However, this PNAS article is one of many to claim that silicon is the best alternative to carbon as a basis for life. Silicon bears some similarities to carbon as expected from its position just below carbon on the periodic table. If we can understand why silicon-based life doesn’t appreciably increase the possibilities for life, then we can gain confidence in the generality of the fine-tuning claim.

As the PNAS article indicates, carbon is much more suitable for life than is silicon. Consider the specialness of carbon with regard to the number of types of molecules that can be formed with H (hydrogen) and the following elements[4]:

H – 1

He – 0

Li – 1

Be -1

B – 7

N- 7

O -2

Ne-0

C (carbon) – over 2300 known types of molecules just involving C and H

Revisiting our dartboard analogy, consider how a life-permitting region is tiny among possibilities. As a reminder, just one finely-tuned parameter, the cosmological constant, has to be set in a narrow life-permitting region among possibilities that is comparable to hitting a bull’s-eye on a huge wall that is 376 million light-years per side. If the life-permitting region for carbon-based life is small, the region for silicon-based life should be smaller since silicon is less suitable for life than is carbon. Although there is one fine-tuning constraint that specifically references carbon, it turns out to also be applicable to silicon. Unless there was a nuclear resonance at just the right energy level, fusion in stars might have never produced carbon. However, without this resonance level there would be a bottleneck that would also inhibit silicon or elements heavier than carbon from being synthesized. Stars make carbon on the way to making silicon. (Most elements past beryllium were synthesized in stellar fusion from smaller atoms.) Thus, universes that produce silicon are no more likely than those that produce carbon – so the bull’s-eye for silicon-based life is smaller and basically just overlaps the carbon bull’s-eye.

Lessons Learned from Origin of Life Research

Consider how some origin of life researchers admit that the origin of the first life form from non-life is exceedingly improbable even with carbon and a diversity of other elements, long-lived stars, and other helpful attributes in our finely-tuned universe. For example, Christian Schwabe writes: “the formation of the first life is viewed as a chance process that occurred in spite of minuscule odds such as 1:10³⁰⁰ and which is accepted only because we are here.[5]“ Eugene Koonin appeals to the multiverse to overcome a horrendous improbability that he estimates at 10^-1018 for a plausible first evolvable cell. Not all researchers are this pessimistic but the slow progress in the field should caution those who think that non-carbon life forms a large region in the space of possible parameters. If carbon is so clearly the best choice for life as most biologists believe and if the origin of life is somewhat of an unlikely event even utilizing organic (carbon-based) molecules such as RNA, how much more unlikely is a naturalistic origin of life without carbon.[6]

Fine-Tuning for Intelligent Life

Recall that my fine-tuning claim refers not to just any life form but to intelligent life. Since theism predicts that God would want some advanced life forms, this raises the bar for constraints on life-permitting universes. If merely primitive replicating cells could originate in somewhat less finely-tuned universe, this still would not count against my fine-tuning claim unless this life could also evolve to achieve intelligence and self-awareness. Clearly more fine-tuning is required for the universe to support rational conscious life than would be required for very primitive life forms.

Closing Thoughts

Most physicists writing about fine-tuning think that there are some very clear-cut cases of fine-tuning such as that for the cosmological constant. Consider, for example, how Nobel prize-winning physicist Steven Weinberg has argued for a multiverse explanation to the fine-tuning of the cosmological constant. He posits vast numbers of universes each with different values for the cosmological constant, the energy density of empty space. Weinberg’s argument for the value being consistent with multiverse predictions relies on a hard limit[7] for the life-permitting range so that our universe can be considered typical among life-permitting universes[8]. Smolin and others have critiqued his prediction as not being that close to what a multiverse would predict but that is irrelevant to my current point which is simply that Weinberg clearly believes that varying this constant by a tiny amount among the possibilities would result in no life of any kind living anywhere in that universe. Refer to my multiverse blog for why our universe would need to be typical among life-permitting universes for a plausible multiverse explanation.

Few physicists specializing in fine-tuning point to other possible forms of life as a supposed refutation to the fine-tuning argument but those who do should write rebuttals to the many peer-reviewed articles claiming life would not exist in certain scenarios involving different physical constants or initial conditions. Skeptics need to show why these authors were mistaken. Perhaps this is a good point of emphasis in urging physicists to be careful in their claims. If some of these fine-tuning claims are over-stated though this would actually provide evidence against a multiverse explanation to the fine-tuning because it would represent ways in which our universe is overly fine-tuned for life. A naturalistic multiverse predicts that our universe should not be more fine-tuned than is minimally necessary to support life.

[1] Forster A. C., et al. Nature Mol. Syst. Biol., 2 . doi:10.1038/msb4100090 (2006).

[2] Early Fixation of an Optimal Genetic Code. Molecular Biology and Evolution. Oxford Journals. Stephen J. Freeland2, et al.

[3] Pace, Norman. “The universal nature of biochemistry”. Proceedings of the National Academy of Sciences 98 (3) (2001): p. 805–8.

[4] This was presented by Luke Barnes at the Philosophy of Cosmology conference in 2013 in Santa Cruz, CA.

[5] Schwabe. Comparative Biochemistry and Physiology Part B: February 1994: (Volume 107, Issue 2) p. 167.

[6] In this blog, I have no intention of getting into discussions about whether or not we have evidence for divine intervention in the origin of life – that is a separate topic. Note that the origin of life and fine-tuning are separate issues. Fine-tuning deals with setting up an environment conducive to life – sort of like that biosphere they setup in Arizona. Conversely, origin of life relates to whether or not life forms were put into that biosphere or originated from non-living matter within it.

[7] By ‘hard limit’ I mean that no other life forms could exist anywhere in universes with cosmological constants whose absolute value exceeded a threshold that is about 120 orders of magnitude less than the natural values predicted by the Standard Model of Particle Physics. BTW, Weinberg first coined the term “Standard Model.”

July 18, 2014/by J. Warner Wallace

The Wisdom Chronicle

Wisdom Chronicle

191. MUSIC, LOVE & SEX “Plato taught us to “mark the music” to understand an individual or his society. After all, people who hum Berlin or Arlen or Gershwin think they want to fall in love; people who hum (hum?) Mötley Crüe or the Ying Yang Twins think they want to have sex. People who listen to Mel Tormé (Nat Cole, Bing Crosby, or Ella Fitzgerald) don’t want to pierce their tongues; people who listen to Eminem (Alanis Morissette, Kurt Cobain, or Public Enemy) don’t want to pin on an orchid corsage. If the American popular song could idealize romantic love to a fault, rock ’n’ roll degrades physical couplings to new lows—destroying not just the language of love and romance, but also the meaning of love and romance. And, I would sadly add, our capacity to experience both. The fact is, between a world in which romantic love is the ideal and a world where nonmarital sex is the goal lies a vast cultural chasm. What we know as romantic love, which aspires to monogamous marriage, builds civilization up; what we know as free love, which aspires to a polymorphous sex life, keeps it down.”

Excerpt From: West, Diana. “The Death of the Grown-Up.”

192. PROPERTY RIGHTS IN BIBLE “According to the teachings of the Bible, government should both document and protect the ownership of private property in a nation. The Bible regularly assumes and reinforces a system in which property belongs to individuals, not to the government or to society as a whole. We see this implied in the Ten Commandments, for example, because the eighth commandment, “You shall not steal” (Exod. 20:15), assumes that human beings will own property that belongs to them individually and not to other people. “This assumption of private ownership of property, found in this fundamental moral code of the Bible, puts the Bible in direct opposition to the communist system advocated by Karl Marx. Marx said: “The theory of the Communists may be summed up in the single sentence: abolition of private property” [Karl Marx, Communist Manifesto, 1948).

One reason why communism is so incredibly dehumanizing is that when private property is abolished, government controls all economic activity. And when government controls all economic activity, it controls what you can buy, where you will live, and what job you will have (and therefore what job you are allowed to train for, and where you go to school), and how much you will earn. It essentially controls all of life, and human liberty is destroyed. Communism enslaves people and destroys human freedom of choice. The entire nation becomes one huge prison.”

Excerpt From: Farrar, Steve. “True Courage.”

193. LOVE “Oh, the comfort, the inexpressible comfort of feeling safe with a person; having neither to weigh thoughts nor measure words, but to pour them all out, just as they are, chaff and grain together, knowing that a faithful hand will take and sift them, keep what is worth keeping, and then, with a breath of kindness, blow the rest away.”

― George Eliot

194. FORGIVENESS “Toward the end of the Civil War, reparations were being discussed in the White House. Abraham Lincoln was told by one of his advisors who favored punishing the South, “Mr. President, you’re supposed to destroy your enemies, not make friends of them!” Mr. Lincoln replied, “Am I not destroying an enemy when I make a friend of him?”

Excerpt From: Wooden, John. “Wooden: A Lifetime of Observations and Reflections On and Off the Court.”

195. HUMILITY “Humility is honestly assessing ourselves in light of God’s holiness and our sinfulness.” — CJ Mahaney

196. MAKE STRAIGHT A’s(?) “School is a place where A students [Professors] teach B students how to work for C students.”

Elite Daily, “The 10 Thing They Don’t Tell You At Graduation” May 7, 2013

197. LAWYERS “Mancur Olson used to argue that, over time, all political systems are likely to succumb to sclerosis, mainly because of rent-seeking activities by organized interest groups. Perhaps that is what we see at work in the United States today. Americans could once boast proudly that their system set the benchmark for the world; the United States was the rule of law. But now what we see is the rule of lawyers, which is something different. It is surely no coincidence that lawyers are so over-represented in the US Congress.”

From: Ferguson, Niall. “The Great Degeneration.”

198. FOOLS “A fool may talk, but a wise man speaks.”

—BEN JONSON

199. SPIRITUAL GROWTH “A Christian is not of hasty growth, like a mushroom, but rather like the oak, the progress of which is hardly perceptible, but in time becomes a great deep-rooted tree. — John Newton

200. FOOLS “Never argue with a fool. People might not know the difference.”

Excerpt From: Heinrichs, Jay. “Thank You For Arguing, Revised and Updated

July 14, 2014/by Jim Whiddon