Consider some of the finely-tuned factors that make our universe possible:
If the strong nuclear force were slightly more powerful, then there would be no hydrogen, an essential element of life. If it was slightly weaker, then hydrogen would be the only element in existence.
If the weak nuclear force were slightly different, then either there would not be enough helium to generate heavy elements in stars, or stars would burn out too quickly and supernova explosions could not scatter heavy elements across the universe
If the electromagnetic force were slightly stronger or weaker, atomic bonds, and thus complex molecules, could not form.
If the value of the gravitational constant were slightly larger, one consequence would be that stars would become too hot and burn out too quickly. If it were smaller, stars would never burn at all and heavy elements would not be produced.
The finely tuned laws and constants of the universe are an example of specified complexity in nature. They are complex in that their values and settings are highly unlikely. They are specified in that they match the specific requirements needed for life.
The following gives a sense of the degree of fine-tuning that must go into some of these values to yield a life-friendly universe:
Gravitational constant: 1 part in 10^34
Electromagnetic force versus force of gravity: 1 part in 10^37
Cosmological constant: 1 part in 10^120
Mass density of universe: 1 part in 10^59
Expansion rate of universe: 1 part in 10^55
Initial entropy: 1 part in 10^ (10^123)
The last item in the list — the initial entropy of the universe — shows an astounding degree of fine-tuning. What all this shares is an incredible, astronomically precise, purposeful care and planning that went into the crafting of the laws and constants of the universe, gesturing unmistakably to intelligent design. As Nobel laureate in physics, Charles Townes stated:
Intelligent design, as one sees it from a scientific point of view, seems to be quite real. This is a very special universe: it’s remarkable that it came out just this way. If the laws of physics weren’t just the way they are, we couldn’t be here at all. The sun couldn’t be there, the laws of gravity and nuclear laws and magnetic theory, quantum mechanics, and so on have to be just the way they are for us to be here.
Some scientists respond, “Well, there must be an enormous number of universes and each one is a little different. This one just happened to turn out right.” That’s a possibility, and it’s a pretty fantastic possibility — it assumes there really are an enormous number of universes and that the laws could be different for each of them. One would like to get a look at the universe-generating machine responsible for this abundance. Would it have to be fine-tuned? The other possibility is that our universe was planned, and that’s why it has come out so special.
William Lane Craig has a fantastic video explaining this:
Many people are fascinated by the fine-tuning argument for God’s existence. The late Christopher Hitchens called the fine-tuning argument “the most intriguing.” Physicist Sean Carroll referred to it as “the best argument that the theists have when it comes to cosmology.”
But just like other arguments for God’s existence, there are rejoinders. One popular-level response is called “the puddle analogy.” The analogy was originally expressed in Douglas Adams’s The Salmon of Doubt: Hitchhiking the Galaxy One Last Time:
This is rather as if you imagine a puddle waking up one morning and thinking, “This is an interesting world I find myself in—an interesting hole I find myself in—fits me rather neatly, doesn’t it? In fact it fits me staggeringly well, must have been made to have me in it!” This is such a powerful idea that as the sun rises in the sky and the air heats up and as, gradually, the puddle gets smaller and smaller, frantically hanging on to the notion that everything’s going to be alright, because this world was meant to have him in it, was built to have him in it; so the moment he disappears catches him rather by surprise. I think this may be something we need to be on the watch out for.
Some think the puddle analogy deals a fatal blow against the fine-tuning argument. If the pondering puddle shouldn’t be surprised about its existence, we shouldn’t either. But does the analogy work? Are advocates of the fine-tuning argument engaging in “puddle thinking?”
Arguments from analogy are a kind of inductive argument. Basically, they reason that because two things are similar, what is true of the first is also true of the second. For an argument from analogy to work, the analogy has to be a good analogy
Of course, no analogy is perfect—there will always be differences. But for an argument from analogy to work, the similarities have to be significant, and the differences have to be superficial. But if the opposite is true—if the differences are significant and the similarities are superficial—well, then, we have a problem. In other words, if the analogy fails, so does the argument.
Puddle Problems
In a recent article titled “The Trouble with Puddle Thinking,” astronomers Geraint Lewis and Luke Barnes explain why this analogy fails.
Consider more closely the puddle’s reasoning. Let’s name our puddle Doug. He has noticed a precise match between two things: 1) his shape and 2) the shape of the hole in which he lives. Doug is amazed! What Doug doesn’t know is that, given A) the fluidity of water, B) the solidity of the hole, and C) the constant downward force of gravity, he will always take the same shape as his hole. If the hole had been different, his shape would adjust to match it. Any hole will do for a puddle. [Emphasis added.]
This is precisely where the analogy fails: any universe will not do for life. Life is not a fluid. It will not adjust to any old universe. There could have been a completely dead universe: perhaps one that lasts for 1 second before recollapsing or is so sparse that no two particles ever interact in the entire history of the universe. [source]
In the puddle analogy, the puddle can exist in any hole. That’s how puddles work. The shape of the hole is irrelevant to the existence of the puddle. If you change the shape of the hole, the shape of the puddle changes, but you always get a puddle.
The problem is, life doesn’t work like that. Life cannot exist in any universe. The evidence from fine-tuning shows that a life-permitting universe is extremely rare. If you change certain conditions of the universe just slightly, you cannot get life anywhere in the universe. For instance, slightly increase the mass of the electron or the up quark, and get a universe with nothing but neutrons. No stars. No planets. No chemistry. No life.
The significant difference: We know that changing the dimensions of a hole does not affect the existence of the puddle. Any old hole will do. There is no fine-tuning for puddles. However, we also know that changing the conditions of the universe does affect the existence of life. There is fine-tuning for life.
So, the puddle analogy has a problem. And it’s a big one. It’s a false analogy. The analogy doesn’t work because getting a life-permitting universe is vastly different from getting a puddle-permitting hole.
Within the context of a life-permitting universe, fine-tuning involves “the claim that the laws of nature, the fundamental parameters of physics, and the initial conditions of the universe are set just right for life to occur.” Robin Collins, The Fine-Tuning of the Cosmos: A Fresh Look at Its Implications,” in The Blackwell Companion to Science and Christianity, 207.
In other words, certain physical constants and quantities exist within an exceedingly narrow range that favors the appearance of life.
This does not mean, necessarily, that the universe was designed but, rather, as physicist Luke Barnes states: “In the set of fundamental parameters (constants and initial conditions) of nature… an extraordinarily small subset would have resulted in a universe able to support the complexity required by life.” But the implication is that it is more likley to have occured via design than by chance.
Reasonable Faith video
Examples of fine Tuning
Even the tiniest change to any constants or quantities will result in a universe incapable of supporting life. For example, if the gravitational fine structure constant (i.e., a measure of the strength of the interaction between charged particles and the electromagnetic force) was slightly smaller, existing matter would have expanded too far and rapidly to form stars and planets. Hence, no life could have formed.
On the other hand, if the gravitational value was too large, the universe would have collapsed on itself, and the stars would have burned out too quickly to allow the existence of life. Moreover, if the electromagnetic force did not exist, there would be no complex chemistry. The chemicals essential for life would be too unstable to allow proper bonding, and there would be insufficient carbon and oxygen to support life.
Alternate views
While some believe that the many observed constants and quantities seem finely tuned for developing intelligent life, others have suggested that there is no way to scientifically test the effect of fine-tuning since there is no way to adjust the values to observe the consequences. As physicist Sabine Hossenfelder stated, a fine-tuned universe represents “an observational constraint on our parameters.” In other words, our knowledge of fine-tuning is interesting but is of limited scientific value since the parameters cannot be changed.
The Fine Tuned Argument [FTA] claims that, given the fine-tuning of the universe, the existence of a
life-permitting universe is very unexpected given naturalism — that “there is only one world, the natural world . . . [which] evolves according to unbroken patterns,
the laws of nature” (Carroll, The Big Picture, 20)—but not particularly unexpected given
theism—that God exists. It thus provides evidence for the existence of God.
Faced with his
own fine-tuning discoveries in physics and astronomy, Fred Hoyle commented
that, “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” (Hoyle, p16).
Virtually no scientists dispute the science behind fine-tuning. What they dispute is what it all means. Three popular explanations for the existence of a fine-tuned universe are:
1) the multiverse explanation
2) fine-tuning is a brute fact of a universe brought about by chance (i.e., single-universe naturalism)
3) the design hypothesis
The Multiverse
The multiverse explanation of fine-tuning proposes the existence of a vast, if not infinite, number of universes with different initial conditions or fundamental boundaries of physics and perhaps even different laws of nature. If there were an endless system of universes, we could expect that at least one universe would be structured to support intelligent “observers.” Thus, we shouldn’t be surprised to find human-like life forms or other embodied conscious agents somewhere in a multiverse. In this scenario, we were randomly selected to live in a universe that supports life.
Evaluation: One problem with the multiverse hypothesis is that NO scientific evidence supports it. None. If multiple universes exist, they are unobservable—without observation and testing, there is no way to generate scientific evidence to support a multiverse hypothesis. One cannot test a hypothesis when no data is forthcoming.
According to physicist Sabine Hossenfelder, any universes outside our own would be “causally disconnected from us.” and “The vast majority of multiverse ideas are presently untestable, and will remain so eternally.” Lost in Math: How Beauty Leads Physics Astray, p 101-107
As a result, the multiverse explanation is not a scientific hypothesis; it is a philosophical (metaphysical) one. Philosophical questions such as this lie outside the purview of traditional scientific methods and must be justified in some other way.
Advocates of the multiverse often posit a "universe-generating" mechanism to explain the origin of other universes. By postulating a universe generator, proponents think that it may increase the probability of getting a life-friendly universe somewhere in the multiverse. However, the speculative cosmologies that are purportedly responsible for generating multiple universes (i.e., string theory, inflationary cosmology) invoke mechanisms that themselves require fine-tuning. Thus, the multiverse hypothesis cannot explain fine-tuning without appealing to some prior fine-tuning mechanism (either the universe generator or whatever generated the generator).
For example, suppose one tries to explain the design of a car by referring to the assembly plant that produces many similar cars. Such a description doesn’t alleviate the need for an explanation for the design of the car. Indeed, it simply points to the need for an explanation of the design of the assembly line that produces the cars. In other words, it shifts the need for explanation to the next level. The shortcoming of this approach is that it leaves one in doubt about the source of all prior fine-tuning processes and mechanisms and still leaves open the question of why these should be random rather than designed.
Thus, even if a multiverse exists, theism may provide a better explanation than naturalism. An infinite set of universes is better explained by an unbounded cause than a random cause. Since there is no good reason to believe that the multiverse must be randomly caused, and since the universe generator must also be finely tuned, a simpler explanation [via Occam's Razor] seems more likely: If a multiverse exists at all, then a single transcendent intelligence designed it to support life.
Single-universe naturalism
Philosophical naturalism [PN] is a worldview that asserts that the existence of intelligent life in our universe is the result of chance processes governed by natural laws. There are no design influences, only blind material causes. However, naturalism is unproven scientifically and therefore requires a substantial defense to warrant belief. And PN is also self-refuting.
Fine-tuning is a brute fact
Single-universe naturalists claim that there is nothing surprising about the fact that we find ourselves in a universe with rational beings because nothing else is possible. Only in a universe that supports life can there be beings capable of observing and reflecting upon fine-tuning. Single-universe naturalists see life in the universe as a brute, inexplicable fact that requires no further explanation. Nobody would be alive to comment on fine-tuning if the universe weren’t life-permitting in the first place. Thus, the existence of human observers is unremarkable.
If one assumes in advance that the fine-tuning found in the universe is the result of chance, then any arrangement of matter is equally improbable (or probable), and there is no reason for one to ask why or how we exist. Naturalists who see fine-tuning as a brute fact say we don’t need to search for a deeper explanation: The universe “just is.”
Evaluation: First, to say that fine-tuning “requires no further explanation” is a matter of opinion. Undoubtedly, many people seek deeper explanations than are readily available. And to say that human existence is “unremarkable” is, at best, arguable.
Second, to justify one’s belief that a fine-tuned universe is merely a brute fact, one must know in advance that the universe is solely the result of chance. In other words, one must assume the truth of philosophical naturalism. However, mere assumptions are not self-justifying. To prove that naturalism is true, one must develop and present good reasons to justify such a belief.
Nevertheless, the assumption of naturalism receives no help from science because naturalism is not a scientific position; it is a philosophical one. To merely assume the truth of naturalism amounts to nothing more than a “naturalism-in-the-gap” belief. Thus, single-universe naturalism is a belief that requires one to put forth evidence and arguments to demonstrate the rationality of naturalism and that it's the best explanation of the evidence
When scientists (or anyone else) assume the truth of philosophical naturalism, they naturally begin to reject anything and everything that does not fit their predetermined viewpoint. Many people take the side of naturalism simply because of a prior commitment since it's the methods and institutions of science that compel us to accept a material explanation of the phenomenal world. They have an unspoken, a priori adherence to material causes to create an apparatus of investigation and a set of concepts that produce only material explanations, no matter how counter-intuitive. But that is not rational. The cure for that, of course, is Reason.
The design hypothesis
For many theists, it is unsurprising that the universe is fine-tuned for intelligent life. After all, if an intelligent being wanted to create a world where intelligent life exists, it seems reasonable that it would set the initial conditions and physical constants of the universe to favor that outcome. A finely tuned universe - one that supports intelligent, self-reflective, rational beings - is perfectly consistent with a theistic explanation. It is a coherent and simple explanation that need not appeal to unnecessary conjectures (e.g., the multiverse) to support its case.
Theists (specifically monotheists) have historically believed that God created the universe and populated it with all forms of life including intelligent life. This has inspired many theists, as well as non-theists, to seek answers to the “how” question through the study of biology, chemistry, and physics. To theists, fine-tuning leads one to look for an ultimate explanation for the universe and its many features. In a theistic world, the Designer could have used any number of methods to ensure the establishment of intelligent life, including a fine-tuned single universe or a multiverse.
Evaluation: Like the multiverse and chance hypotheses, theism cannot be proven scientifically. In other words, the theistic explanation is not a scientific position but a philosophical one. But that's okay since reason is the basis of all knowledge, not science. Nevertheless, many philosophical/theological arguments favor theism, while naturalism has few if any, positive arguments. Therefore, the success of theism depends on demonstrating why it explains fine-tuning better than the other two hypotheses.
Conclusion
Although each of the three explanations offered is consistent with a fine-tuned universe, none of them can explain fine-tuning with absolute certainty. But then we know almost nothing with aboslute certainty.
Both the multiverse and chance hypotheses are doubtful. Neither is supported by scientific evidence, and both lack philosophical arguments to support their foundational beliefs.
Nevertheless, the design hypothesis is currently the best explanation of the data - it infers that the fine-tuned constants and quantities of the universe favor the influence of a designing intelligence. And the design hypothesis indirectly supports theism, as this designer must be beyond the confines of the physical.
Objection A- The puddle analogy is an argument against FTA as it compares a puddle to life, and any hole to the environment and its pressures. It shows that organisms with specific adaptations are well-suited to any environment.
Repy: SETI looks for design [or artificiality - i.e. not generated by natural processes], an arson investigator can tell if a fire came about naturally or was started by a human, the police can determine if a death was natural or at the hands of a human, an archeologist can say whether it’s a just rock or an arrowhead, etc. An appeal to a designer is accepted in every field of inquiry, including biology - we can determine whether a virus, like Covid-19 was designed of was natural.
An a priori non-design stance seems to be an a priori ideological conclusion, rather one that is driven by the facts
Objection C -This is a God of the gaps argument.
Reply: A God of the Gap argument assumes an act of God as the explanation for an unknown phenomenon. But I’m not citing an unknown phenomenon or a gap in our knowledge. I am using the inference to the best explanation and citing what we do know about the universe, in order to choose between design [purposeful, intentional guided process with a goal] over chance [a purposeless, unintentional unguided process without a goal] or an the scientifically unknowable [the multiverse]
Objection D -You can't apply Zeno's paradox to causal chains.
Reply: Per the [IEP] "...many of Zeno’s arguments turn crucially on the notion that space and time are infinitely divisible, he was the first person to show that the concept of infinity is problematical."
Where did I say that "space and time are infinitely divisible"? Difficult to evaluate your objection since it's so vague.
Objection E -You can't speak of BEFORE the universe, when time as we know it is a product OF this universe.
Reply: 1) I guess that wipes out the possiblity for any multiverse theory
2) Perhaps I spoke of casually prior.
Objection F -Saying that "God" is the TOE is literally meaningless. It provides no knowledge or insight into the universe, it's just wordplay. Pumpkin soup is the explanation for everything. See, we call all assert meaningless things.
Reply: LOL, showing that God exists provides NO knowledge or insight into the universe? That's totally absurd the the nth degree.
Objection G - how can a designer create the universe without time, space, or energy/material?
Reply: My post is limited to showing the the best explanation is that the universe was designed, not how that design was implemented. This question will have to be addressed in a future post.
That being said, scientific observations are consistent with the idea that the universe came into existence out of nothing rather than existing eternally or forming from pre-existing material. Modern astrophysics has confirmed by both mathematics and observation that the universe is continually expanding; that space itself is expanding.
An expanding universe must have a starting point. An infinite regress of causes isn't logically viable. While there are a variety of models that, at best, delay the problem further into the past, none can escape the ultimate reality that even the very substance of the universe had a beginning. These facts also negate eternal, cyclical models of the universe found in many eastern religions in which the universe has always existed. The universe is finite. It began to exist, and there was no matter before it. And every model of the universe must contend with the fact that there must be a starting point for existence.
Objection H - What if the constants and quantities had to be the way they are? If their values are somehow necessary, then fine-tuning isn’t a problem that needs to be resolved or explained.
I'll let Wiliam Lane Craig address this:
It seems to be pretty widely acknowledged that the constants and quantities in question are not physically necessary. This is because they cannot be predicted on the basis of current physical theory or any extension of current physical theory. Several years ago Stephen Hawking addressed your question at a cosmology conference at the University of California, Davis. Notice the alternative answers which he identifies to the fundamental question he poses:
Does string theory, or M theory, predict the distinctive features of our universe, like a spatially flat four dimensional expanding universe with small fluctuations, and the standard model of particle physics? Most physicists would rather believe string theory uniquely predicts the universe, than the alternatives. These are that the initial state of the universe, is prescribed by an outside agency, code named God. Or that there are many universes, and our universe is picked out by the anthropic principle.
Notice that the options mentioned by Hawking are precisely the three alternatives which I address. Hawking argues that the first option, physical necessity, though the option most physicists would prefer to be true, is a vain hope: “M theory cannot predict the parameters of the standard model. Obviously, the values of the parameters we measure must be compatible with the development of life. . . .But within the anthropically allowed range, the parameters can have any values. So much for string theory predicting the fine structure constant.” He wrapped up by saying,
"...even when we understand the ultimate theory, it won’t tell us much about how the universe began. It cannot predict the dimensions of spacetime, the gauge group, or other parameters of the low energy effective theory. . . . It won’t determine how this energy is divided between conventional matter, and a cosmological constant, or quintessence. . . . So to come back to the question. . . Does string theory predict the state of the universe? The answer is that it does not.It allows a vast landscape of possible universes,in which we occupy an anthropically permitted location.
In fact, this idea of a “cosmic landscape” predicted by string theory has become something of a phenom in its own right. It turns out that string theory allows around 10^500 different universes governed by the present laws of nature, so that the theory does not at all render the observed values of the constants physically necessary. [source]
