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Author | Topic: A Guide to the tactics of Evolutionists | |||||||||||||||||||||||
Dr Adequate Member (Idle past 314 days) Posts: 16113 Joined: |
Species being driven into extinction do face a loss of diversity, yes. Meanwhile the domestic wolf, or "dog", which is flourishing, displays a marked range of genetic (and morphological!) diversity.
--- Consider the following facts: we are all descended from (Y-nuclear) Adam; the Y-chromosome is not subject to sexual recombination; men have different Y-chromosomes. Where did the variety come from? ---
So we see that genetic diversity can and does drop very rapidly with the types of changes leading to smaller populations becoming isolated and presumably evolving (or going extinct). However, it takes thousands of years presumably for mutations to increase genetic diversity. In other words, the processes decreasing genetic diversity greatly outweigh the processes creating genetic diversity, and evos cannot account for that, and frankly, I don't think they have even tried to as far as I can tell. But of course we account for it just as you do, but in less ambiguous language: where you say "The processes decreasing genetic diversity greatly outweigh the processes creating genetic diversity" as though it were a law of nature, we say "In the case of wolves, the processes decreasing genetic diversity (being driven nearly to extinction by humans, loss of habitat, loss of prey) greatly outweigh the processes increasing genetic diversity." It would indeed take "thousands of years" to undo the damage we've done. We are living in the middle of a vast extinction event, caused by us. At present, the genetic diversity of the world is falling, because we're killing it off; but this has not always been the case. In particular, a subgroup of a species isolated on some island did, in the past have thousands, or millions, of years to overcome the "founder effect". Darwin's finches seem quite diverse, do they not? --- And good grief man, do you suppose that geneticists don't know about this stuff? Heck, do you suppose that the guy who did the studies refered to in the article was a creationist? Or the guy who wrote the article? We know this stuff. Look up the "50/500 rule". Edited by Dr Adequate, : No reason given.
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Dr Adequate Member (Idle past 314 days) Posts: 16113 Joined: |
Whether the population thrives is not the point really. Cheetahs thrived for a long time with a narrow range of genetic diversity. The point is the process creates less genetic diversity, not more. When "the process" involves being driven nearly to extinction by one of the greatest extinction events of all time, then yes, this does reduce genetic diversity. The dodo, for example, now exhibits no genetic diversity whatsoever. Edited by Dr Adequate, : No reason given.
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Dr Adequate Member (Idle past 314 days) Posts: 16113 Joined: |
How do you think a new species can emerge if the species occupying the same ecological niche is not being driven to extinction? It can, for example, colonize an unoccupied niche.
Moreover, isn't it fairly normal for species to be driven to extinction over time? Are you suppossing that extinction is not part of the process of evolution? Yes; and no, respectively.
As to the rest of your post, I am not sure what relevant points you are trying to make. Do evos know that they have never properly substantiated the fact that forces decreasing genetic diversity outweigh forces increasing genetic diversity? I would agree that this claim has not been substantiated; but you are the one who is making it. So far, your only attempt to substantiate it has been to conflate the extinction event now ongoing with the general course of nature. I notice you have not commented on the Y-chromosome. Why not?
Heck, as an undergrad in the 80s, I knew that Haeckel's stuff was forged and there was no phylotypic stage, but plenty of evo scientists in that field kept insisting on a phylotypic stage and references Haeckel's stuff as well. But you cannot quote them, because ... ?
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Dr Adequate Member (Idle past 314 days) Posts: 16113 Joined: |
Imagination is great, isn't it? So a species just a teeny bit different than another species is going to replace it, but the first doesn't go extinct. Keep in mind colonizing an unoccupied niche most likely involves a different geography or something like that, and so once again there is isolation of a smalller group involved, not the whole-sale replacement of a near identical group over and over again with very small changes adding up to whole new types of creatures. What do you think you're replying to?
So you don't consider extinction of older species via natural selection a part of the evo model? Yes. I do. I said so. What do you think you're replying to?
Wrong, it's not real science to posit something and say, well, no one has disproven it so it must be so. What do you think you're replying to?
Evos have a claim that small-scale changes add up to macroevolution, but they have not substantiated it, as you admit. Had they substantiated it, they would have to show that the observed forces limiting genetic diversity is less than the mostly unobserved forces supposedly increasing it. Where are the peer-reviewed studies showing these things, Dr Adequate? Where are the evo studies showing that small-scale changes can add up to macroevolution even when the process limits genetic diversity? Just saying, hey, this is the way it is, and you have to show why it cannot, is not sufficient. To be empirical-based science, you have to show it, and evos have not for this most basic claim of their's. Conclusion: it's not empirical-based science but faith-based assertions, and dogmatic assertions at that. See my comments on the Y-chromosome. To which I have drawn your attention more than once. Edited by Dr Adequate, : No reason given.
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Dr Adequate Member (Idle past 314 days) Posts: 16113 Joined: |
I suggest you do your own homework. It is now part of my homework to substantiate your arguments? How very convenient for you.
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Dr Adequate Member (Idle past 314 days) Posts: 16113 Joined: |
Random strings of words do not challenge my beliefs, they merely tax my patience.
For example: You: Moreover, isn't it fairly normal for species to be driven to extinction over time? Are you suppossing that extinction is not part of the process of evolution? Me: Yes; and no, respectively. You: So you don't consider extinction of older species via natural selection a part of the evo model? Me: Yes. I do. I said so. What do you think you're replying to? --- If you have a cogent argument, feel free to make it. If you're just going to say random stuff without reference to what I've posted, that is not a debate. PS: Still no comment about the Y-chromosome, eh? Pesky facts, huh? Edited by Dr Adequate, : No reason given. Edited by Dr Adequate, : No reason given.
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Dr Adequate Member (Idle past 314 days) Posts: 16113 Joined: |
ou gonna address the heart of the argument or continue to dodge it with ignorance and sophistry, Dr Adequate? Your thoughts on the Y-chromosome, please?
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Dr Adequate Member (Idle past 314 days) Posts: 16113 Joined: |
not that interested in it, and don't see the relevance to the discussion at hand.....if you do see some relevance, you may explain that.....otherwise, I'd really like to see those studies verifying this most basic claim of evos, that mutational rates are sufficient to overcome the tendency towards reducing genetic diversity in populations. Care to do that? I refer you again to the existence of variety in the human Y chromosome.
You could, btw, just come clean and admit there are no studies, Dr Adequate. But I do not live in the magical fantasy land in your head.
That would be the right thing to do; show some integrity, and then we could probably move the discussion forward. But if you continue to dodge that point, further exploration of side points with you does not seem fruitful. In your magic dreamworld, no doubt I am "dodging the point". In the real world, I have provided you with facts which show an increase in genetic diversity, which you refuse to comment on.
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Dr Adequate Member (Idle past 314 days) Posts: 16113 Joined: |
I will read your post in more detail and respond accordingly when I have more time, but on a cursory review, I would just point out that finding a few examples where an organism has increased genetic diversity via mutation is not the same as a peer-review study showing that the typical rate of mutation is sufficient, and sufficient for all types of living organisms, including mammals, reptiles, etc,.....to overcome the forces limiting genetic diversity. In other words, finding some examples that could be used to bolster an argument is not the same as a peer-review study and assessment of the argument altogether. The issue is much broader than simply observing there are instances of genetic diversity increasing with mutations. For example, there are also a lot of cases of extinctions as well. The issue is whether the mutational rates outweigh the forces limiting macroevolution, creating extinctions, and so forth. You now seem to be requiring that someone should show you that the net genetic diversity of the whole world is increasing. In the first place, no-one can make that measurement directly, and in the second place, it isn't increasing right now. Humans are driving species to extinction at a frightening rate, and so long as this keeps up, the world's genetic diversity is decreasing. But such is not always the case. Can you explain, for example, how the "conquest of the land" should have reduced net genetic diversity?
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Dr Adequate Member (Idle past 314 days) Posts: 16113 Joined: |
Nope. All I am asking is that evos substantiate their claims with actual empirical data. That seems to be something you guys are loathe to be willing to do when it comes to your most basic claims. Which "basic claims" have we not substantiated?
We know the standard evo model usually involves some element of isolation into smaller populations... No.The new population starts off small, and if it survives, will grow. The population from which its derived need not decrease in size (for more than a generation). Why should it? This does not make for loss of genetic diversity. You are mixing up the unfortunate fate of the wolves with the colonization of a new niche. The effects on genetic diversity are quite, quite different.
We also know evos are willing to create theories of rates of genetic mutations, which are used for example in molecular analysis, but for some reason evos appear unwilling to demonstrate that the forces decreasing genetic diversity are less than the rates of mutation. So reluctant that we have done so several times on this thread. Edited by Dr Adequate, : No reason given.
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Dr Adequate Member (Idle past 314 days) Posts: 16113 Joined: |
You have not substantiated that mutational rates are sufficient to overcome forces limiting genetic diversity in microevolution. Well, we have in fact. See above for more details.
You have not substantiated that microevolution is macroevolution, Which no-one has claimed.
or works towards macroevolution. It is patently obvious that a sequence of small changes add up to one cumulative large change.
You have not provided one peer-reviewed study verifying the 2 basic claims of evos above. Why is that? Because whenever you manage to raise a definite issue, the answer is bleedin' obvious. If you like, I'll produce peer-reviewed papers to prove that the human Y chromosome is heterozygous, but I assumed you knew that.
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Dr Adequate Member (Idle past 314 days) Posts: 16113 Joined: |
It's not shifting the goalposts to insist evos substantiate their claims. I really don't get why you guys are so resistant to the idea that basic evo claims should be backed up with empirical study and analysis. We're not; they have been. If you think there's some particular observation that should have been made, but hasn't, or some experiment which should have been performed, but hasn't, or some calculation which should have been made, but hasn't, then please say what it is.
The bottom line is you guys have not ever substantiated one of the most basic claims of evo theory. You haven't shown that mutation rates are sufficient to overcome loss of genetic diversity due to smaller populations becoming isolated. Well, we've given you observational and experimental data proving this. I'm sure I could dig out the maths for you. What more do you want?
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Dr Adequate Member (Idle past 314 days) Posts: 16113 Joined: |
Actually, it's patently obvious that you don't know what the heck you are talking about. You failed to provide one study substantiating the claims of evos we have been discussing, and you made the absolute ludicrous comment above. In which you can, apparently, point out no flaw.
By your logic, anyone could up and swim to England because, you know, little steps can add up ... I suppose since prop airplanes can fly that they can also go to the moon and back, eh? No.
This is the kind of idiotic simpleton type of thinking ... ... that creationists attribut to evolutionists because you can't debate with what we actually claim.
Rather than listen to criticism and look at the actual process for what occurs (decreases in genetic diversity via isolation as one example), That is not, in fact, what happens. Remember? I explained your mistake. Don't you people ever learn?
evos just assert that magically small changes add up to macroevolution, or large-scale changes. Er ... magic is not required for that to be true. Magic would be required for that not to be true. Yes, a lot of small changes add up to a lot of change. If many changes are made to a genome, then it will be considerably different from the original. This follows from the meanings of the word "change" and the word "different". Do you see how this works?
In other words, you guys have not, will not, and cannot substantiate your claims because you beleive in them without any empirical evidence or logic whatsoever beyond child-like, simpleton analysis which totally avoids the actual process itself. Yes, we "totally avoid the actual process itself" by talking about mutations and the genome, where as you look at the fine details of the process such as swimming to England and prop airplanes. You so funnee.
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Dr Adequate Member (Idle past 314 days) Posts: 16113 Joined: |
I have repeatedly demanded specifics. No. Your demands have been incredibly vague, this is why I'm trying to pin you down on them. You wish that some experiment should have been performed, some observation made, some calculation done. What, precisely? What do you find wanting in all the experimental and observational data with which we've supplied you? Why won't you even discuss it?
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Dr Adequate Member (Idle past 314 days) Posts: 16113 Joined: |
You are the one claiming "magic"; that a process hostile towards macroevolution, namely the process of variation where groups of species are isolated, losing genetic diversity, is actually the same as macroevolution, being the small steps that add up to macroevolution. I made no such claim. Put down that riduculous straw doll and argue with me.
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