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Junior Member (Idle past 5267 days) Posts: 27 From: Adelaide, Australia. Joined: |
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Author | Topic: "The Edge of Evolution" by Michael Behe | |||||||||||||||||||||||||||||||
Kaichos Man Member (Idle past 4510 days) Posts: 250 From: Tasmania, Australia Joined: |
'cos I have this feeling that you're making this up as you go along... It's really not that hard. Each nucleotide can be one of four bases A,T,C or G. The chance of any one being correct for the enzyme in question is therefore 1 in 4. First nucleotide correct? 1 in 4. Second nucleotide correct as well? 1 in 42=16. Third as well? 1 in 43=64. And so on, all the way up to 1 in 41000. The -1 represents the one chance in this enormous figure that will give you the desired enzyme. If you want any enzyme you can divide the result by 20,000 (that's the estimated number of enzymes possible). It's still a laughingly tiny probability. Edited by Kaichos Man, : add quote. "Often a cold shudder has run through me, and I have asked myself whether I may have not devoted myself to a fantasy." Charles Darwin
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Kaichos Man Member (Idle past 4510 days) Posts: 250 From: Tasmania, Australia Joined: |
What do you mean here? That there are 20,000 protein coding genes in humans? That there are only 20,000 possible functional coding sequences? It is estimated that there are around 20,000 enzymes. I don't know how accurate this figure is- if you have a more accurate one, please let me know.
Simply understanding the concept of third base wobble shows you should be cutting your improbability factor by about a third since in many cases changes at the third base do not affect the amino acid sequence produced. You want to reduce the figure by 1/3? Go ahead. It's still side-splittingly improbable.
But even then you are making the same mistake that has been pointed out numerous times by assuming that that particular function was a goal No no. By taking all the enzymes into account I'm including any function. "Often a cold shudder has run through me, and I have asked myself whether I may have not devoted myself to a fantasy." Charles Darwin
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Kaichos Man Member (Idle past 4510 days) Posts: 250 From: Tasmania, Australia Joined: |
But you are only taking all other enzymes in the human body into account Let's simplify things and say its the possibility of evolving a human enzyme. There. Now the figures are correct. Show me how wrong I am. "Often a cold shudder has run through me, and I have asked myself whether I may have not devoted myself to a fantasy." Charles Darwin
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Kaichos Man Member (Idle past 4510 days) Posts: 250 From: Tasmania, Australia Joined: |
The title of the lecture is "Making Genetic Networks Operate Robustly: Unintelligent Non-design Suffices." Computer models can return any result you like. You just tweak the variables until you get the desired outcome. Dawkins "Weasel" is a classic example. Edited by Kaichos Man, : typo "Often a cold shudder has run through me, and I have asked myself whether I may have not devoted myself to a fantasy." Charles Darwin
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Kaichos Man Member (Idle past 4510 days) Posts: 250 From: Tasmania, Australia Joined: |
G'day Drosophilla.
Utter miscomprehension on how probability stacks up in evolution. What you don't appreciate is that evolution works on the power of accumulation. I'm sure you are aware that I started a thread entitled "Adding information to the genome". In it I tried (and failed, for the most part) to get some evolutionists to agree to an amount of new information needed to be "seen" by natural selection. My argument was simple: up until natural selection can "see" a de novo genetic structure it can only be built by random forces. Note that this argument does not ignore natural selection; it merely attempts to calculate the amount of new information needed to enable natural selection to enter the equation. A quote from your referred website: "But this argument contains a hidden assumption: that the entire page has to be typed at once, or that the entire amino acid sequence has to be assembled at once. What if you can build it piece by piece?" Same problem. Natural selection can do nothing until there's phenotypic modification. Of course, that can be caused by a single nucleotide switching an existing gene on or off, but that's not creating new information, it's merely modifying existing information. Having said this, I should say that a level should be established in the creation of our gene for a human enzyme at which natural selection plays a role (at that point probabilities become meaningless because there is a directive force). Would natural selection be able to "see" a half-functional gene? Then the probability reduces to 1 in 4500 divided by 20,000. It's still workably impossible, even with natural selection factored in. "Often a cold shudder has run through me, and I have asked myself whether I may have not devoted myself to a fantasy." Charles Darwin
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Kaichos Man Member (Idle past 4510 days) Posts: 250 From: Tasmania, Australia Joined: |
If all they did was simply "tweaked" their models until they got the result they wanted instead of learning about the problems in their design then they'd never get a successful design and there would be no point to modelling. Precisely. So how would you learn about design problems in a program modelling evolution? By finding evolution doesn't happen, of course. And what do you do in such a situation? Well the program is obviously defective, so you work on it until it does show evolution happening. It's always easy enough to justify an adjustment to a variable. Dawkins Weasel (yes, I know, it's a toy) is a prime example of this. I mean, what exatly did the "correct letters" represent? Single nucleotides? Wouldn't be seen by natural selection. Genes? Can't be created by random processes. But Dawkins was smart enough to refuse to say what they represented. "Often a cold shudder has run through me, and I have asked myself whether I may have not devoted myself to a fantasy." Charles Darwin
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Kaichos Man Member (Idle past 4510 days) Posts: 250 From: Tasmania, Australia Joined: |
It was a simple way of explaining how cumulative selection can work on inherited traits to 'climb mount improbable' But it is precisely the "inherited traits" that are so misleading and dishonest. SNPs won't be seen by selection (unless they alter existing information). Genes will be seen by selection, but they are too complex to be built by random processes. Mt Improbable can't be climbed because the inheritable traits are either invisible to selection or too complex to occur without selection. Dawkins program is akin to me flapping my arms and saying "There, feel the air pressure under your hands? That's how you fly- it's easy." "Often a cold shudder has run through me, and I have asked myself whether I may have not devoted myself to a fantasy." Charles Darwin
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Kaichos Man Member (Idle past 4510 days) Posts: 250 From: Tasmania, Australia Joined: |
The "null string" consisting of no DNA contains no information. Blimey. Who came up with that? Rene Descartes? I would define genetic information as: "A DNA sequence that plays a role, direct or indirect, in the formation or function of an organism". No doubt this will precipitate a small avalanche of examples that are clearly information, but don't fit the definition. "Often a cold shudder has run through me, and I have asked myself whether I may have not devoted myself to a fantasy." Charles Darwin
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Kaichos Man Member (Idle past 4510 days) Posts: 250 From: Tasmania, Australia Joined: |
This is utter babble! Is it, indeed? Well let's take a look at it. I wrote: "Natural selection can do nothing until there's phenotypic modification" You wrote: "Natural selection will not actively select AGAINST a neutral modification (i.e. a change that does not effect a phenotypic change" Hmm. The babble appears to be contagious.
This can be the case for numerous changes. If you need a twenty step link to a beneficial phenotypic change, then as long as the first 19 steps are either beneficial OR NEUTRAL, (which the majority of single step changes are), then the accumulating changes will not be taken out. You appear to be advocating the creation of complex novel genetic structures by random (non-selective) processes. Fine- Kimura believed in that. The trouble is, if you want to create, say, a gene, you'll need about 1300 'neutral' mutations, not 20. And given that for every 175 mutations, about 3 of them will be deleterious, you're not going to get very far. "Beneficial" mutations are too rare to calculate, according to Kimura. "Often a cold shudder has run through me, and I have asked myself whether I may have not devoted myself to a fantasy." Charles Darwin
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Kaichos Man Member (Idle past 4510 days) Posts: 250 From: Tasmania, Australia Joined: |
If Dawkins claimed that his program explained biological evolution by means of natural selection you'd have a point. But he explicitly says it doesn't and he explicitly says it explains something else. But you have just stated the purpose of the program:
So it shows precisely what it is meant to show: That inherited traits, with variations, can climb mount improbable if a selection method is employed. Inherited traits? Variations? Selection? If the program wasn't designed to explain biological evolution then it was designed to con people into believing that it does. "Often a cold shudder has run through me, and I have asked myself whether I may have not devoted myself to a fantasy." Charles Darwin
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Kaichos Man Member (Idle past 4510 days) Posts: 250 From: Tasmania, Australia Joined: |
Con men all over know that it is always a bad idea to explain that your con is a con and why it is a con to the mark. Point taken. However, the core idea you believe it was designed to show:
How a selection method can help ratchet up probabilities so that what appears to be a highly improbable end product isn't necessarily as improbable as it first appears. Is a neat way of side-stepping Irreducible Complexity, in that it assigns selective advantage to each of a sequence of small modifications. No wonder Tricky Dicky used an abstract model for that. The reality of SNPs and genes would soon expose the impossibility of the process.
You should probably read the book. Yes. Given a parallel lifetime "Often a cold shudder has run through me, and I have asked myself whether I may have not devoted myself to a fantasy." Charles Darwin
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