Design flaws in organisms indicate evolution, not intelligent design

[Compassionist]

The existence of design flaws in living organisms is often cited as evidence for evolution by natural selection rather than intelligent design by an all-loving, all-knowing, and all-powerful deity. If such a being existed and created life intentionally, we might expect optimal design yet what we see instead are structures and processes that are inefficient, prone to failure, or even harmful.
Here are some significant biological design flaws that point to evolution rather than perfect design:
________________________________________
1. Human Birth Canal vs. Big Brain
Flaw: Human babies have large heads due to our large brains, but the human pelvis is narrow for bipedal walking.
Result: Childbirth is extremely painful and dangerous a leading cause of death historically.
Evolutionary Explanation: Our ancestors evolved larger brains and upright walking separately, leading to a dangerous compromise.
________________________________________
2. Wisdom Teeth
Flaw: Most people don't have room for third molars, causing impaction, infections, and pain.
Result: Many need surgery to remove them.
Evolutionary Explanation: Our ancestors had larger jaws due to diet, but modern humans' jaws shrank faster than tooth evolution could keep up.
________________________________________
3. Human Retina Is Backward
Flaw: The photoreceptor cells in the human eye are behind layers of neurons and blood vessels.
Result: Creates a blind spot and reduces image quality.
Evolutionary Explanation: The eye evolved incrementally, not from a clean-slate design.
________________________________________
4. Recurrent Laryngeal Nerve (Giraffe Example)
Flaw: This nerve travels from the brain to the larynx, but loops around the aorta.
Result: In giraffes, it travels over 15 feet instead of a direct path of a few inches.
Evolutionary Explanation: It's a leftover from fish ancestors, where this path made sense. Evolution modified existing structures rather than redesigning from scratch.
________________________________________
5. Human Menstrual Cycle
Flaw: Humans shed the uterine lining even if not pregnant, wasting resources and causing pain.
Result: Menstrual cramps, anemia, mood changes.
Evolutionary Explanation: Other mammals reabsorb the lining. Our approach may have evolved due to pathogen risks in internal fertilization.
________________________________________
6. Shared Path for Food and Air
Flaw: The esophagus (food) and trachea (air) share an entrance.
Result: Risk of choking a leading accidental cause of death.
Evolutionary Explanation: The throat evolved in stages, without foresight.
________________________________________
7. Human Spine and Back Pain
Flaw: Our spine is an S-curve not ideally suited for upright walking.
Result: Many people suffer chronic back pain, herniated discs, etc.
Evolutionary Explanation: Our ancestors were quadrupeds. The upright posture evolved later, leading to inefficient structure.
________________________________________
8. Brain Vulnerability and Mental Illness
Flaw: The brain is highly energy-consuming and prone to many dysfunctions.
Result: High rates of depression, anxiety, bipolar disorder, schizophrenia, etc.
Evolutionary Explanation: Natural selection favored reproductive success, not mental wellness or long-term wellbeing.
________________________________________
9. Knee Joint Design
Flaw: Knees bear immense strain, especially the ACL (anterior cruciate ligament), which often tears.
Result: Common injuries in sports and aging.
Evolutionary Explanation: Knees evolved from quadruped ancestors, not optimally engineered for bipedal running and jumping.
________________________________________
10. Genetic "Junk" and Mutations
Flaw: The genome is full of non-coding or redundant DNA and is prone to harmful mutations.
Result: Genetic diseases, cancer, and congenital defects.
Evolutionary Explanation: DNA accumulates "baggage" over time. There's no intelligent editing or streamlining process.
________________________________________
11. Susceptibility to Cancer
Flaw: Cells divide for life but are prone to mutations that cause cancer.
Result: One of the top global causes of death.
Evolutionary Explanation: Cell division is essential for life, but natural selection can't eliminate all cancer risk especially after reproductive age.
________________________________________
12. Human Psychology Biases
Flaw: We are prone to cognitive biases (e.g., confirmation bias, tribalism, overconfidence).
Result: Misjudgments, discrimination, and conflict.
Evolutionary Explanation: These evolved to enhance survival in specific environments, not to produce truth-seeking rationality.
________________________________________
If we were designed by an omnibenevolent, omniscient, and omnipotent being, such flaws are impossible to justify. Evolution by natural selection, on the other hand, explains these quirks and imperfections as the result of a messy, blind, trial-and-error process where old parts are tweaked, not replaced, and survival/reproduction, not perfection, is the end goal.

[SiNcE_1985]

This claim is the single fatal flaw in your entire argument.

It is not a conclusion. It is an unsupported premise.

You keep asserting it as self-evident, but you never justify it — and modern biology exists precisely because this premise is false.

I did justify it.

You cannot explain any origins or mechanisms of fine-tuning, by appealing to a biological system of which itself requires fine-tuning.

To do so, would be to apply circular reasoning..which is fallacious on your part.

You need an external explanation, and quite frankly such an explanation is not available to you on your naturalistic worldview...which is why you're stuck in fallacious-land trying to defend an illogical position.

Why this premise fails — cleanly and decisively

You are treating engineered complexity and evolved complexity as the same kind of thing.

They are not.

• Engineered systems require foresight because they do not reproduce.
• Biological systems acquire complexity because they do reproduce with variation and selection.

This is not a minor distinction — it is the entire point of evolutionary theory.

Reproduction requires fine-tuning, which is what is being asked to be explained.

Your “DNA = computer code” analogy fails for one reason only

Computer code:
• does not self-replicate,
• does not mutate,
• does not undergo selection,
• does not form populations.

DNA:
• self-replicates,
• mutates,
• undergoes selection,
• forms lineages with inheritance.

Bicycle:
Does not have an engine
Does not have a transmission
Does not require gas
Does not require oil

Motorcycle:
Has an engine
Has a transmission
Requires gas
Requires oil

Pointing out those differences shows what? Neither was designed? No. One was designed and the other wasn't? No.

The differences in and of itself doesn't prove anything...so the point you were trying to make; I don't know.

Because of this difference, complexity in DNA does not require foresight.

It does require foresight.

In order to make a living cell, amino acids gotta be arranged in specific sequences...and random, mindless, and blind processes won't give you those precise sequences...and that is the point.

It is like writing a cohesive paragraph. The words have to be arranged in a specific order, with proper spacing...commas and periods have to be in certain places and not others.

You don't get cohesive sentences from random typing and letter/word formations.

It requires foresight, on what needs to go where on the paper.

And this foresight and know-how comes from minds, not random, blind and mindless processes.

Selection replaces foresight.

Selection selects. It selects from information that is already there. It doesn't create.

And that's what evolutionists have confused.

It assumes that complexity alone is the relevant variable.

It isn’t.>

The relevant variable is whether the system can accumulate complexity incrementally without foresight.

Biological systems can.
Artifacts cannot.

Empty assertion, and against observation.

You've never observed localized systems of..

1. Parts
2. Functions
3. Purpose

Without fine tuning, and design.

So, to acknowledge this small localized scales, but then suddenly stop or turn away from the same logic once larger, cosmic scales...is to commit the taxicab fallacy.

It is disgusting, inconsistent logical reasoning.

Why fine-tuning does not rescue this argument

Even if we grant (for the sake of argument) that:

• the universe is fine-tuned,
• the fine-tuning is unexplained,
• the fine-tuning is improbable,

none of that restores your failed premise.

Fine-tuning concerns boundary conditions of physics.
Evolution concerns biological mechanisms operating within those conditions.

Once replication exists, fine-tuning does zero explanatory work at the biological level.

This is not denial — it is scope discipline.

Why repeating “no life without fine-tuning” does not help

Everyone agrees life depends on chemistry and physics.

What does not follow is that physics therefore explains feathers, eyes, or genomes.

Dependency ≠ explanation.

Saying otherwise is the same error every time, no matter how emphatically it’s stated. You keep making the same mistake in all of your posts in this thread.

Your argument collapses at one point and never recovers:

You assume that complexity + function logically implies intelligence.

Evolution exists because that assumption is false.

Until you either:
• show that cumulative selection cannot generate functional complexity, or
• show that biological systems behave like non-replicating artifacts,

no appeal to fine-tuning, improbability, entropy, or intuition can touch evolution.

That is the wall — and it isn’t on the other side.

Until I show?

No, until you show how..

1. A universe could have come from nothing.

2. Infinity could have been traversed (if you don't believe #1).

3. Life can come from nonliving material.

4. Consciousness could have arisen from non-mental states.

5. 1 / 10^10^123 odds can be met.

If you can demonstrate any of those 5, not only would I be shocked, but I'll be impressed.

And not only would I be impressed, I'll become an atheist.

[Compassionist]

[Replying to SiNcE_1985 in post #171]

You cannot explain any origins or mechanisms of fine-tuning, by appealing to a biological system of which itself requires fine-tuning.

To do so, would be to apply circular reasoning.

This is the core misunderstanding — and it is still a category error.

Evolution is not an explanation of fine-tuning, cosmology, or the origin of physical law. I have said this before, but you keep ignoring what I actually said.

It does not attempt to explain:
• why the universe exists,
• why constants have their values,
• why chemistry is possible.

So there is no circularity to accuse it of.

You are criticising evolution for failing to explain something it explicitly does not claim to explain.

That is not a flaw in the theory — it is a misapplication of it.

Reproduction requires fine-tuning, which is what is being asked to be explained.

No — this is where you keep replacing dependency with explanation.

Yes:
• biology depends on chemistry,
• chemistry depends on physics,
• physics depends on boundary conditions.

But it does not follow that physics explains biological structure.

Dependency ≠ explanatory replacement.

This is why physics does not explain protein folding, and cosmology does not explain speciation.

It does require foresight. Random, mindless processes won’t give you those precise sequences.

This is simply false by observation.

Natural selection does not need foresight because it is cumulative.

• Mutations generate variation.
• Selection filters variants.
• Retained variants bias future outcomes.

This process has been:
• observed in laboratories,
• demonstrated in silico,
• applied in medicine,
• exploited in agriculture.

No foresight is required — only retention and differential reproduction.

Selection selects. It doesn’t create.

This is a clear misunderstanding.

Selection does not “create” information ex nihilo — it accumulates functional information incrementally by retaining beneficial variants.

That is exactly how complexity arises without intention.

Denying this is not a refutation — it is rejecting the defining mechanism of the theory.

You’ve never observed parts, function, and purpose without fine-tuning and design.

This is demonstrably false.

We observe:
• novel enzymatic functions arising via mutation,
• new metabolic pathways evolving,
• functional traits emerging under selection pressure,
• populations adapting in real time.

Function does not imply foresight.
Purpose does not imply intention.
Teleonomy ≠ teleology.

Now the critical correction — what would actually disprove evolution

Your final move shifts the goalposts:

Until you show:

1. A universe from nothing
2. Traversal of infinity
3. Life from non-life
4. Consciousness from matter
5. 1 / 10^10^123 odds

None of the above would disprove evolution.

They belong to:
• cosmology,
• metaphysics,
• philosophy of mind,
• probability theory.

Evolution would still stand even if every one of those remained unsolved.

What WOULD disprove evolution — precisely

Evolution would be falsified if we observed any of the following:

• Heritable traits appearing without genetic variation
• Complex organisms appearing out of chronological order in the fossil record
• Genetic data failing to form nested hierarchies
• Speciation never occurring under isolation
• Mutations never producing selectable functional differences
• Selection failing to bias outcomes over generations

None of these occur. If you can show these occur, I will abandon evolution and contact the Nobel Prize Committee to nominate you for a Nobel Prize because it would be such an exceptional achievement.

Instead, evolution:
• predicts these patterns,
• explains them,
• and is repeatedly confirmed by them.

Final clarification

You are demanding that evolution explain:
• why reality exists,
• why laws exist,
• why consciousness exists.

That is not a critique — it is a category error.

Evolution explains only one thing:

How biological diversity arises once self-replicating systems exist.

It does that successfully.

Until you show that cumulative selection cannot generate functional complexity — or that biological systems behave like non-replicating artifacts — evolution remains untouched by appeals to fine-tuning, improbability, or metaphysical dissatisfaction.

That is the wall.

And it is exactly where your argument stops.

[SiNcE_1985]

This is the core misunderstanding — and it is still a category error.

Evolution is not an explanation of fine-tuning, cosmology, or the origin of physical law. I have said this before, but you keep ignoring what I actually said.

This is a strawman, because not only have I neither said nor implied that evolution is an explanation of fine-tuning, but that is precisely what I've been arguing against.

I've been maintaining that fine-tuning needs to be explained, and I've said multiple times that nothing within nature, nor any scientific methodology or inquiry, can provide this explanation.

Don't know how you've been missing all of that.

It does not attempt to explain:
• why the universe exists,
• why constants have their values,
• why chemistry is possible.

So there is no circularity to accuse it of.

Straw man, for the same reason above.

You are criticising evolution for failing to explain something it explicitly does not claim to explain.

That is not a flaw in the theory — it is a misapplication of it.

Enough strawman to fill up an entire barnyard.

No — this is where you keep replacing dependency with explanation.

Yes:
• biology depends on chemistry,
• chemistry depends on physics,
• physics depends on boundary conditions.

But it does not follow that physics explains biological structure. Dependency ≠ explanatory replacement.

This is why physics does not explain protein folding, and cosmology does not explain speciation.

Jesus Christ, you're missing the point...what I'm saying is; fine-tuning, at its core, needs to be explained..and you can't explain it, without appealing to something (X) within nature...but whatever you appeal to in nature, itself, requires fine-tuning!!

So this is the fundamental, fatal FLAW of your entire position...and it ain't going anywhere.

This is simply false by observation.

Natural selection does not need foresight because it is cumulative.

• Mutations generate variation.
• Selection filters variants.
• Retained variants bias future outcomes.

This process has been:
• observed in laboratories,
• demonstrated in silico,
• applied in medicine,
• exploited in agriculture.

No foresight is required — only retention and differential reproduction.

Presupposing fine-tuning.

I fail to see how any of what you just said explains fine-tuning.

This is a clear misunderstanding.

Selection does not “create” information ex nihilo — it accumulates functional information incrementally by retaining beneficial variants.

That is exactly how complexity arises without intention.

Denying this is not a refutation — it is rejecting the defining mechanism of the theory.

Okkk. I never denied any of that.

This is demonstrably false.

We observe:
• novel enzymatic functions arising via mutation,
• new metabolic pathways evolving,
• functional traits emerging under selection pressure,
• populations adapting in real time.

Function does not imply foresight.
Purpose does not imply intention.
Teleonomy ≠ teleology.

Now the critical correction — what would actually disprove evolution

Your final move shifts the goalposts:

Fine-tuning is presupposed.

Don't know what part of that you ain't understanding.

None of the above would disprove evolution.

They belong to:
• cosmology,
• metaphysics,
• philosophy of mind,
• probability theory.

Evolution would still stand even if every one of those remained unsolved.

This is false, because again; if abiogenesis is false and God doesn't exist, then evolution is necessarily false.

Not only that, but all of that stuff goes hand/hand...you can't have the evolution of life without cosmic and chemical fine-tuning.

I understand you'd rather keep them separate due to convenience, but nah, it's time to hold feet to fires.

What WOULD disprove evolution — precisely

Evolution would be falsified if we observed any of the following:

• Heritable traits appearing without genetic variation
• Complex organisms appearing out of chronological order in the fossil record
• Genetic data failing to form nested hierarchies
• Speciation never occurring under isolation
• Mutations never producing selectable functional differences
• Selection failing to bias outcomes over generations

This is all bio-babble.

At the end of the day, dogs produce dogs, cats cats, fish fish, etc.

That is all you, or anyone else have ever observed.

The idea that a reptile evolved into a bird, defies every single observation that man has ever made as it pertains to animal copulation, and animal birth.

None of these occur. If you can show these occur, I will abandon evolution and contact the Nobel Prize Committee to nominate you for a Nobel Prize because it would be such an exceptional achievement.

I'll show those occur, once you show me a a reptile-to-bird type transformation in nature.

*Incoming "that's not how evolution works, it takes hundreds of millions of years" spiel*

Instead, evolution:
• predicts these patterns,
• explains them,
• and is repeatedly confirmed by them.

Here is a prediction; I predict that dogs will continue to produce dogs, in all of future recorded history.

Final clarification

You are demanding that evolution explain:
• why reality exists,
• why laws exist,
• why consciousness exists.

That is not a critique — it is a category error.

Evolution explains only one thing:

How biological diversity arises once self-replicating systems exist.

It does that successfully.

Until you show that cumulative selection cannot generate functional complexity — or that biological systems behave like non-replicating artifacts — evolution remains untouched by appeals to fine-tuning, improbability, or metaphysical dissatisfaction.

That is the wall.

And it is exactly where your argument stops.

Yeah, buddy; your continuing to miss the point here.

I get an A for effort.

[Compassionist]

[Replying to SiNcE_1985 in post #173]

This is a strawman, because not only have I neither said nor implied that evolution is an explanation of fine-tuning, but that is precisely what I've been arguing against.

No — this is the contradiction you are not noticing.

You repeatedly say two incompatible things:

1. Evolution does not explain fine-tuning.
2. Evolution fails because it presupposes fine-tuning.

You cannot hold both without invalidating your own objection.

If evolution does not claim to explain fine-tuning, then its reliance on fine-tuning is not a flaw — it is a background assumption, just like physics relies on mathematics without explaining why mathematics works.

That is not a strawman. That is logical consistency.

Fine-tuning needs to be explained, and nothing within nature can explain it.

Even if that were true, it would still not touch evolution.

Here is the precise structure you keep collapsing:

• Fine-tuning → why a universe with chemistry exists
• Abiogenesis → how self-replicating chemistry begins
• Evolution → how biological diversity arises once replication exists

These are sequential, not competing explanations.

Failure (or incompleteness) at an upstream level does not invalidate a downstream mechanism.

That is why cosmology does not refute chemistry, and chemistry does not refute biology.

There are only four serious answer-classes to why fine-tuning that enables physics and chemistry exists. Everything else is a variant, a rhetorical move, or a confusion of levels.

None of these answers currently has decisive proof. The real issue is what each can and cannot explain.

1. Brute fact.

“That’s just how reality is.”

On this view, the constants and laws simply have the values they do, with no deeper explanation.

There is no reason why these values rather than others.
Fine-tuning is real but unexplained.
The universe could have been otherwise; it just isn’t.

This is intellectually unsatisfying to many people, but it is logically coherent. Science often bottoms out in brute facts (e.g. why there is something rather than nothing).

What it explains: nothing beyond stopping the regress.
What it does not explain: necessity, purpose, or selection.
Status: philosophically weak, but not refuted.

2. Necessity.

“The constants couldn’t have been otherwise.”

Here the idea is that deeper, unknown laws force the constants to take exactly these values.

Fine-tuning is an illusion caused by ignorance.
A deeper theory would show these values are inevitable.

This is speculative, but not incoherent. Physics has repeatedly unified apparently free parameters before.

What it explains: why no alternatives exist.
What it does not explain: why those deeper laws exist.
Status: unknown; currently unsupported but possible.

3. Selection effects (multiverse or equivalent).

“Only universes like this can be observed.”

If many universes (or many regions, or many realizations of laws) exist, then:

Most are lifeless.
We necessarily observe one compatible with observers.

Important point: this is not “anything can happen.” It is conditional observation.

However:

There is currently no direct empirical access to other universes.
This explanation shifts the problem upward (why that generating structure exists).

What it explains: why life-permitting values are observed.
What it does not explain: why the generating mechanism exists.
Status: speculative, not falsified, not confirmed.

4. Intentional selection by a God or Gods (design) - there are many Gods of many religions (all are faith-based).

“The values were chosen.”

This posits some form of agency selecting constants.

Crucially:

Fine-tuning alone supports at most a generic selector.
It does not identify:

a personal God,
moral intentions,
revelations,
miracles,
or biological design.

It also raises immediate questions:

Why these values rather than others?
Why this much suffering?
Why indirect, law-governed processes rather than direct creation?

What it explains: why life-permitting conditions exist.
What it does not explain: specific features of biology, history, or morality.
Status: metaphysical, underdetermined, non-unique.

The key point most debates miss: fine-tuning explains at most why a universe capable of complexity exists.
It does not explain what happens once such a universe exists.

That is the clean separation:

Fine-tuning → stage
Physics → rules of motion
Chemistry → molecular possibilities
Abiogenesis → origin of replication
Evolution → diversification after replication

Trying to use fine-tuning to explain biology is a level jump.
Trying to use biology to explain fine-tuning is a category error.

The honest answer: we do not yet know why fine-tuning exists.

What we do know is this:

Fine-tuning does not refute evolution.
Fine-tuning does not prove a specific God among many possible God or Gods.
Fine-tuning does not license collapsing explanations across levels.

It raises a deep metaphysical question — but raising a question is not answering it.

That distinction is where good reasoning begins, and where most forum debates collapse.

If abiogenesis is false and God doesn't exist, then evolution is necessarily false.

This is flatly incorrect.

Evolution does not require abiogenesis to be true.
It requires only that replication exists at some point.

Even if:
• life were created,
• seeded,
• extremely rare,
• or unexplained,

evolution would still explain diversification once replication begins.

You are confusing origin of replication with diversification of replicators.

That confusion is the engine of your argument — and it is invalid.

You can't have evolution without cosmic and chemical fine-tuning.

Again: dependency ≠ explanation.

Oxygen is necessary for fire.
Oxygen does not explain combustion chemistry.

Fine-tuning is a boundary condition.
Evolution is a mechanism.

A boundary condition does not explain a mechanism.

Repeating this point does not weaken it — it exposes where your reasoning stops.

At the end of the day, dogs produce dogs.

Correct — and this supports evolution, not creationism.

Evolution does not predict dogs giving birth to cats.
It predicts population-level divergence across many generations with inherited continuity.

Every single observation you cite — heredity, constraint, continuity — is predicted by evolution.

You are demanding a phenomenon the theory explicitly says will not occur, then declaring its absence a failure.

That is not falsification.
That is misrepresentation.

Show me a reptile-to-bird transformation in nature.

This is not a valid falsification demand.

Evolution would be falsified if we observed:

• Mammals appearing before fish
• Genetic hierarchies failing to nest
• Speciation never occurring under isolation
• Mutations never affecting fitness
• Lineages not branching but resetting

None of these occur.

What you are asking for is a violation of the theory, not a test of it.

Here is the single point where your argument fails — and never recovers

You keep making this move:

“Evolution presupposes fine-tuning → therefore evolution must explain fine-tuning → therefore evolution fails.”

That move is invalid.

Presupposition is not explanation.
Dependency is not mechanism.
Background conditions are not causal accounts.

Until that single error is corrected, no appeal to improbability, entropy, abiogenesis, or metaphysics touches evolution at all.

That is not evasion.

That is where the wall actually is.

[The Barbarian]

Jesus Christ, you're missing the point...what I'm saying is; fine-tuning, at its core, needs to be explained..and you can't explain it, without appealing to something (X) within nature...but whatever you appeal to in nature, itself, requires fine-tuning!!

"Fine-tuning" is observed to evolve. For example, the evolution of a new, irreducibly complex enzyme system. Either the universe just happened to become in a way that made such things possible, or God created it to do so. Makes no difference to evolution.

What WOULD disprove evolution — precisely

A rabbit fossil in undisturbed Cambrian deposits.
Evolution of a trait in a population for the exclusive benefit of a different species.
And all that other stuff you've been shown.

The idea that a reptile evolved into a bird, defies every single observation that man has ever made as it pertains to animal copulation, and animal birth.

Huxley, over a hundred years ago, predicted transitionals between birds and other dinosaurs, based on the anatomy of living archosaurs. Today, we have many, many observations of such transitionals. And having found dinosaur bone with a bit of heme surviving in it, the heme turned out to be more like that of birds than that of other reptiles. Can you name even one feature of birds not found in other dinosaurs? I'd like to know what that is.

What do you have?

[SiNcE_1985]

No — this is the contradiction you are not noticing.

You repeatedly say two incompatible things:

1. Evolution does not explain fine-tuning.

It doesn't.

That is the simple truth of the matter, especially when the question of "What best explains fine-tuning" is being asked.

It simply is what it is.

2. Evolution fails because it presupposes fine-tuning.

Um, no.

A better depiction would be..

2. Evolution fails as a plausible explanation, to explain fine-tuning, on a naturalistic worldview.

A little context goes a long way, doesn't it?

You cannot hold both without invalidating your own objection.

If evolution does not claim to explain fine-tuning, then its reliance on fine-tuning is not a flaw — it is a background assumption, just like physics relies on mathematics without explaining why mathematics works.

That is not a strawman. That is logical consistency.

This is indeed a strawman, because I'm not saying evolution claims fine-tuning....I'm saying that if fine-tuning cannot be explained via nature, then neither can anything that depends on it.

It is very simple.

Even if that were true, it would still not touch evolution.

Here is the precise structure you keep collapsing:

• Fine-tuning → why a universe with chemistry exists
• Abiogenesis → how self-replicating chemistry begins
• Evolution → how biological diversity arises once replication exists

These are sequential, not competing explanations.

Strawman.

No one said anything about any of those being competing explanations.

The point is, fine-tuning needs to be explained and you cannot logically appeal to either to explain it.

There are only four serious answer-classes to why fine-tuning that enables physics and chemistry exists. Everything else is a variant, a rhetorical move, or a confusion of levels.

None of these answers currently has decisive proof. The real issue is what each can and cannot explain.

1. Brute fact.

“That’s just how reality is.”

On this view, the constants and laws simply have the values they do, with no deeper explanation.

There is no reason why these values rather than others.
Fine-tuning is real but unexplained.
The universe could have been otherwise; it just isn’t.

No, that won't work.

The mere existence of the universe is not even a brute fact...it began to exist.

If a deck of cards began to exist from a non-intelligent (mindless) cause/source, what would the probability of the cards being in A, K, Q, J, 1,2,3,4,5,6,7,8,9,10 of all spades...and then followed by the same orderly sequence of the next suit (hearts), and so on?

The probably is low and next to impossible.

The low entropy conditions of the universe from its state of origin wasn't cumulative...it began from a low entropy state....which would be similar to a deck of cards beginning from such an orderly state, as mentioned above.

It ain't happening.

So, the possibility of the universe existed in the first place is impossible, and even if it did, it wouldn't begin in such an orderly state.

Those are two, independent problems that you have, good sir.

And neither one is looking good for you.

So you're right back to square one; failing to explain the origins of the universe nor the fine-tuning which accompanies it.

Geez. Tough, tough.

This is intellectually unsatisfying to many people, but it is logically coherent. Science often bottoms out in brute facts (e.g. why there is something rather than nothing).

What it explains: nothing beyond stopping the regress.
What it does not explain: necessity, purpose, or selection.
Status: philosophically weak, but not refuted.

2. Necessity.

“The constants couldn’t have been otherwise.”

Here the idea is that deeper, unknown laws force the constants to take exactly these values.

Fine-tuning is an illusion caused by ignorance.
A deeper theory would show these values are inevitable.

This is speculative, but not incoherent. Physics has repeatedly unified apparently free parameters before.

What it explains: why no alternatives exist.
What it does not explain: why those deeper laws exist.
Status: unknown; currently unsupported but possible.

3. Selection effects (multiverse or equivalent).

“Only universes like this can be observed.”

If many universes (or many regions, or many realizations of laws) exist, then:

Most are lifeless.
We necessarily observe one compatible with observers.

Important point: this is not “anything can happen.” It is conditional observation.

However:

There is currently no direct empirical access to other universes.
This explanation shifts the problem upward (why that generating structure exists).

What it explains: why life-permitting values are observed.
What it does not explain: why the generating mechanism exists.
Status: speculative, not falsified, not confirmed.

4. Intentional selection by a God or Gods (design) - there are many Gods of many religions (all are faith-based).

“The values were chosen.”

This posits some form of agency selecting constants.

With genuine, all due respect...this is cosmo-babble.

Saying a lot, without saying NOTHING.

Brute fact won't work because the universe is contingent. It does not exist necessarily.

The argument from contingency
shaves off this hypothesis.

Crucially:

Fine-tuning alone supports at most a generic selector.
It does not identify:

a personal God

It does...because the laws, constants/values that govern our universe is mathematically precised.

It is like a cosmic guitar, of which the strings are fine-tuned to give it the perfect sound.

The universe was mathematically engineered...and engineers have minds. And to have a mind, require personhood.

moral intentions,
revelations,
miracles,
or biological design.

I agree (except for biological design), which is why the fine-tuning argument is not used to argue for a specific god.

But we do know that this causal agent had to have been incredibly smart and incredibly powerful.

That's a start, and a long way from atheism.

It also raises immediate questions:

Why these values rather than others?

If other values were used, you'd be asking the same question about those.

Then it would be nothing more than goal post moving

Why this much suffering?

Different topic altogether.

Why indirect, law-governed processes rather than direct creation?

God is the direct, primary cause...and the law-governed process in/of itself is the secondary cause.

What it explains: why life-permitting conditions exist.
What it does not explain: specific features of biology, history, or morality.
Status: metaphysical, underdetermined, non-unique.

Fine-tuning itself is a feature of biology.

The key point most debates miss: fine-tuning explains at most why a universe capable of complexity exists.
It does not explain what happens once such a universe exists.

Without fine-tuning, no physics or chemistry is possible.

You cannot explain what happens once the universe exists, without presupposing fine-tuning.

You are continually applying circular reasoning.

That is the clean separation:

Fine-tuning → stage
Physics → rules of motion
Chemistry → molecular possibilities
Abiogenesis → origin of replication
Evolution → diversification after replication

Trying to use fine-tuning to explain biology is a level jump.
Trying to use biology to explain fine-tuning is a category error.

Physics, chemistry, abiogenesis, evolution....would not be possible if 10^10^123 odds were not met, on one chance.

The honest answer: we do not yet know why fine-tuning exists.

Gen 1.

We know.

What we do know is this:

Fine-tuning does not refute evolution.

Dogs produce dogs. Evolution is refuted on that alone.

Fine-tuning does not prove a specific God among many possible God or Gods.

If any one of those specific gods exists, then atheism is defeated.

Fine-tuning does not license collapsing explanations across levels.

?

This is flatly incorrect.

Evolution does not require abiogenesis to be true.
It requires only that replication exists at some point.

Even if:
• life were created,
• seeded,
• extremely rare,
• or unexplained,

evolution would still explain diversification once replication begins.

Um, no.

On your worldview, life wasn't created...so there is no need to hypothesize creationism.

On your view, God doesn't exist...so abiogenesis is the only game in town...and it is an unproven theory...so, if your theory relies on something that is unproven, then the theory itself is unproven.

Your theory only goes as far as what it is dependent upon ...and if it depends on abiogenesis, then abiogenesis is what needs to be true, in order for your theory to remain valid.

You are confusing origin of replication with diversification of replicators.

That confusion is the engine of your argument — and it is invalid.

Makes no sense.

Again: dependency ≠ explanation.

Oxygen is necessary for fire.
Oxygen does not explain combustion chemistry.

Can combustion exist without oxygen?

No, it can't.

My point exactly.

Next..

Fine-tuning is a boundary condition.
Evolution is a mechanism.

A boundary condition does not explain a mechanism.

Repeating this point does not weaken it — it exposes where your reasoning stops.

Bless your little heart, sir.

Correct — and this supports evolution, not creationism.

Evolution does not predict dogs giving birth to cats.
It predicts population-level divergence across many generations with inherited continuity.

Every single observation you cite — heredity, constraint, continuity — is predicted by evolution.

You are demanding a phenomenon the theory explicitly says will not occur, then declaring its absence a failure.

That is not falsification.
That is misrepresentation.

A reptile evolving into a bird is synonymous with a dog giving birth to a cat.

Now, using bio-babble, you can (and will) certainly babble your way into a long, jenky explanation as to the difference between both....but it's all the same; an animal producing what it isn't, instead of what it is.

This is not a valid falsification demand.

Evolution would be falsified if we observed:

• Mammals appearing before fish
• Genetic hierarchies failing to nest
• Speciation never occurring under isolation
• Mutations never affecting fitness
• Lineages not branching but resetting

None of these occur.

What you are asking for is a violation of the theory, not a test of it.

Here is the single point where your argument fails — and never recovers

You keep making this move:

“Evolution presupposes fine-tuning → therefore evolution must explain fine-tuning → therefore evolution fails.”

That move is invalid.

Presupposition is not explanation.
Dependency is not mechanism.
Background conditions are not causal accounts.

Until that single error is corrected, no appeal to improbability, entropy, abiogenesis, or metaphysics touches evolution at all.

That is not evasion.

That is where the wall actually is.

LOL

[SiNcE_1985]

Jesus Christ, you're missing the point...what I'm saying is; fine-tuning, at its core, needs to be explained..and you can't explain it, without appealing to something (X) within nature...but whatever you appeal to in nature, itself, requires fine-tuning!!

"Fine-tuning" is observed to evolve. For example, the evolution of a new, irreducibly complex enzyme system. Either the universe just happened to become in a way that made such things possible, or God created it to do so. Makes no difference to evolution.

If God created it to do so, it makes a difference to atheism.

A rabbit fossil in undisturbed Cambrian deposits.
Evolution of a trait in a population for the exclusive benefit of a different species.
And all that other stuff you've been shown.

I've been in backyards, farms, and zoos.

And all I've been shown is; dogs produce dogs, cats cats, etc etc.

Spare me the voodoo stuff.

Huxley, over a hundred years ago, predicted transitionals between birds and other dinosaurs, based on the anatomy of living archosaurs. Today, we have many, many observations of such transitionals.

There are similarities between a bicycle and a motorcycle...I guess we should conclude that bicycles evolved into motorcycles over time inside of a manufacturing plant.

Anatomy is open to interpretation...but live births are not.

We've never seen animals produce what they aren't, so let's stick to the observation.

And having found dinosaur bone with a bit of heme surviving in it, the heme turned out to be more like that of birds than that of other reptiles. Can you name even one feature of birds not found in other dinosaurs? I'd like to know what that is.

What do you have?

Similarities doesn't prove ancestry.

[Compassionist]

[Replying to SiNcE_1985 in post #176]

I'm saying that if fine-tuning cannot be explained via nature, then neither can anything that depends on it.

This is the exact logical mistake.

Dependency does not transfer explanatory burden downward.

• Biology depends on chemistry.
• Chemistry depends on physics.
• Physics depends on boundary conditions.

But it does not follow that unresolved questions in cosmology invalidate well-confirmed biological mechanisms.

That is like saying:

• Fire depends on oxygen.
• Therefore combustion chemistry is invalid unless oxygen’s origin is explained.

That is a non sequitur.

Evolution explains diversification once replication exists. It does not claim to explain why the universe exists. You are importing a boundary question into a mid-level mechanism.

That is the category error.

Please note that just because we currently don't know how fine-tuning came to be, it does not mean it was done by the Biblical God. It could be brute fact or any of the other possibilities I covered in my previous post. You must prove that it was done by the Biblical God using evidence that it was done by the Biblical God. The two self-contradictory creation stories in the Bible don't match what we know from science.

The universe began to exist. Therefore brute fact won't work.

You are shifting from fine-tuning to the cosmological argument.

Even if we grant:

• The universe began.
• The universe is contingent.

That still does not refute evolution.

Cosmological contingency arguments operate at the level of metaphysics.
Evolution operates at the level of biological mechanisms.

These are not competing accounts.

1 / 10^10^123 is impossible.

No. It is astronomically improbable under a specific assumed probability distribution.

But that distribution is unknown.

You are assuming:

• A uniform distribution over constants.
• A single random draw.
• No selection effects.
• No deeper constraints.

None of those assumptions are established.

Improbability does not become impossibility merely by adding zeros.

Otherwise every unique shuffled deck of cards would be impossible.

Fine-tuning itself is a feature of biology.

No.

Fine-tuning concerns:

• Initial entropy.
• Cosmological constant.
• Strength of gravity.
• Particle masses.

Biology concerns:

• Mutation.
• Inheritance.
• Selection.
• Population divergence.

These are different explanatory levels.

Saying “no fine-tuning, no biology” is true — but it does not mean fine-tuning explains biological structure.

Necessary condition ≠ sufficient explanation.

If abiogenesis is false and God doesn't exist, then evolution is false.

Incorrect.

Evolution requires only:

• Replication.
• Heritable variation.
• Differential reproduction.

If replication began by:

• Unknown chemistry,
• Extremely rare conditions,
• Seeding,
• Or even divine creation,

Evolution would still describe diversification afterward.

You are conflating:

Origin of replication ≠ Diversification of replicators.

Those are separate scientific questions.

Dogs produce dogs. Evolution is refuted on that alone.

Evolution predicts heredity.

It does not predict dogs producing cats.

It predicts:

• Population divergence over many generations.
• Nested ancestry.
• Transitional forms.
• Genetic hierarchies.

All observed.

Demanding a reptile-to-bird transformation in one lifetime misunderstands the timescale of population-level evolution.

That is not falsification. I have made this point many times in many of my posts in this thread. Yet, you keep coming back to it as if repeating your error will make it correct - it won't.

Now — what would actually prove evolution wrong?

Here is what would overturn evolutionary theory:

• Mammals in Cambrian rock layers.
• Genetic data failing to form nested hierarchies.
• Speciation never occurring under isolation.
• Mutations never affecting fitness.
• Heritable traits appearing without genetic variation.
• Lineages resetting instead of branching.

None of these occur.

Instead:

• Fossils appear in chronological order.
• Genetics forms nested trees.
• Speciation is observed.
• Mutation generates selectable variation.

That is why evolution stands.

Final clarification

Your argument depends on this move:

“Evolution depends on fine-tuning → therefore evolution must explain fine-tuning → therefore evolution fails.”

That inference is invalid.

Fine-tuning is a boundary question.
Evolution is a biological mechanism.

One being unsolved does not collapse the other.

Until you show that cumulative selection cannot generate functional complexity, or that biological systems behave like non-replicating artifacts, evolution remains intact — regardless of unresolved cosmological questions.

That is the structural wall.

And it is still standing.

[SiNcE_1985]

[Replying to Compassionist in post #178]

Bro, you're just not getting it...so, well just leave it there.

Drop the link for the other thread/topics you'd like to discuss.

In the meantime, we'll have you hold this L, and keep it moving.

[Compassionist]

[Replying to SiNcE_1985 in post #179]

I got it just fine. It's you who is not getting the facts. I even told you how to actually disprove evolution and thus win a Nobel Prize. Here are some other threads you may or may not want to engage with:

viewtopic.php?t=42683

viewtopic.php?t=37926

viewtopic.php?t=40324