Quote:
Originally Posted by expatCA
I agree to some extent, but genetic variation does not have anything to do with evolution. As the author of the book I referenced pointed out, all such mutations to date have caused degeneration, not improvement and . Dogs are still dogs. This fits scripture but not evolution.
In effect you agree that Dawkins got it wrong as what has occurred does not truly fit evolution at this point.
Plus no evidence of evolution exists as they came into existence quite suddenly with NO previous record of a fore-bearer. To complex to be accidental. Again this fits scripture which allows for such variations in "Kinds" which is a broader category than modern "species".
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Are you are talking about Behe's
The Edge of Evolution (what the Dawkins' article was about)?
Some problems with Behe…
Irreducible Complexity
This is the idea that it is impossible for an arch to exist, since it cannot stand up until the keystone is inserted, which is the last step. In the real world, arches are supported by a framework until the keystone is inserted. The framework is then no longer needed. It is removed because it is in the way, obstructing the space under the arch.
Eyes evolved gradually by steps. At each step anything that is no longer needed can go away. In fact it is often beneficial for it to go away. Creatures that live underground that have close aboveground cousins often no longer have eyes. If one does not need to see, the eye is a handicap. It is vulnerable to damage, subject to infection and is a pathway to the brain.
Speaking of eyes, we see precursors to eyes all over. There are microorganisms that are photosensitive. If light suddenly changes to shadow they dart in a random direction. The shadow might be a predator and a random direction is more likely to be away from a predator than toward it. Other microorganisms are differentially photosensitive on each side. This give them a better shot at going away from the predator. Some have indentations containing the photo-sensors. The difference in angles between the two sides gives even better info on which way to move. If they live in salt water – and that is by far most of the live-able volume of the earth – a transparent membrane in those depressions would help protect those delicate sensors from the salt, and also from physical damage. Thicken that membrane and fill it with water and it now a more flexible bumper, further protecting the sensors from damage. And guess what! We got a lens! Off and running on the way to real eyes. If the complete eye were designed from scratch, why do we see this progression? Or did God design each of those examples separately? If so, why?
BTW the photoreceptors in the human eye are in backwards, making gigantic numbers of them necessary. The octopus eye is very similar to the human eye except that the receptors are in the ‘right’ way. Does God love octopi more that he took more care in designing them?
Random Selection
Behe thinks that many
simultaneous mutations are needed to make large changes. He does not understand(or just ignores) the power of
cumulative selection.
Imagine ten little boxes in a row, each one able to hold a one digit number, in effect a ten digit number. On a random selection basis, how many tries would it take to get some particular number, say all sevens? It would take 10 billion random tries. That is random selection.
Now here is cumulative selection.
Select a box at random. If it does not now contain a
7, insert a random digit in the range 0 to 9. That is a mutation. If the box now contains a
7, leave it alone.
7 represents a gene with survival value. That is one step.
How many steps will it take to get the first
7? (Assume there are no
7s to begin with.) Since there are originally no
7s it does not matter which box gets picked. 1 step is enough. There are 10 possible values that can be inserted, so on average it will take 10 steps to get the first
7. (1 step times 10 possible values = 10)
How many steps will it take to get the second
7? There is now 1
7 so it will take 10/9 (= 1.11) steps to find a box without a
7. 1.11 steps times 10 possible values = 11.1 steps.
The number of tries for each subsequent
7 are:
#3: 10/8 = 1.25 x 10 = 12.5
#4: 10/7 = 1.43 x 10 = 14.3
#5: 10/6 = 1.67 x 10 = 16.7
#6: 10/5 = 2.00 x 10 = 20.0
#7: 10/4 = 2.50 x 10 = 25.0
#8: 10/3 = 3.33 x 10 = 33.3
#9: 10/2 = 5.00 x 10 = 50.0
#10: 10/1 = 10.00 x 10 = 100
10 + 11.1 + 12.5 + 14.3 + 16.7 + 20.0 + 25.0 + 33.3 + 50.0 +100 = 292.9
10 billion tries for random selection
293 tries for cumulative selection
Cumulative section is over 34 million times as efficient as random selection is this instance
Make it 20 boxes instead of just 10
100 billion billion steps for random selection
720 tries for cumulative selection
Efficiency: over 130 billion
30 boxes
1000 billion billion billion steps for random selection
1199 tries for cumulative selection
Efficiency: over 800 million billion billion
And this is assuming that ALL
7s are necessary. 9 out of 10 is not bad and takes quite a few fewer steps.
And it is also assuming that all
7s are necessary. There is a truly tremendous variety of successful DNA in the world. Maybe all
6s is another opportunity.
Things that are unthinkable for random selection are much easier for cumulative selection.
Malaria
Behe makes a big deal out of malaria versus human immunity. Immunity to malaria is related to a certain gene. If you do not have the gene you are subject to malaria. If you inherited the gene from
one parent, you are immune to malaria, But if you inherited the gene from
two parents you are even more subject to malaria than someone without the gene [b]and[b] you are also subject to sickle cell anemia. From an evolutionary standpoint, this is understandable. Survival is about being fit
enough. If a mutation helps most of a population survive but does a number on some of them, that gene will survive. How does ID explain this? Is the Designer a sadist or just incompetent?
But Behe does not go that far. He believes in a common ancestor and in evolution within a species. (Too bad his prediction about protein binding sites turned out to be totally wrong, which he has admitted to.) He rejects Young Earth Creationism. So using Behe to support scripture is not going to work.