Any alternate hypothesis to "common descent" would have to address all the facts. Actually no. In Darwin's own words:
If it could be demonstrated that any complex organ existed, which could not possibly have been formed by numerous, successive, slight modifications, my theory would absolutely break down. "
Charles Darwin, "On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life", Chapter 6.
By Darwin's own terms, evolution has been disproven with Behe's bacterial flagellum.
Let's talk about Behe, shall we? Or are you going to ignore this post as well?
These comments are from this page
http://www.world-of-dawkins.com/Catalano/box/behe.htm
'Scientists say...'
Yes, Michael Behe is a scientist, but is "Intelligent Design" science? If so, it will be the first science established without a single technical paper published for peer-review, including zero by Behe himself. For some reason he has decided to completely bypass professional review and go directly to a Darwin-doubting public. But more to the point, what is wrong with this book? Here is a summary of the critiques you will find included on this page and others:
First, let's be clear about something. Michael Behe has not created a "Theory of Intelligent Design" (ID). He offers no general laws, models, or explanations for how design happens, no testable predictions, and no possible way to falsify his hybrid evolution/ID hypothesis. He is simply claiming that design is a fact that is easily detectable in biochemical systems. The real science of ID is yet to come, and Behe just wants to wedge the door open a bit. So what does this magic Intelligent Design Detection Kit look like? Basically open the box and all it contains is a tweezer. Use it to pluck out any part of a system, and if the system stops functioning properly, it must be the product of design. Why? Because it proves that the system was "Irreducibly Complex" (IC)...
"By irreducible complexity I mean a single system which is composed of several interacting parts that contribute to the basic function, and where the removal of any one of the parts causes the system to effectively cease functioning. An irreducibly complex system cannot be produced gradually by slight, successive modifications of a precursor system, since any precursor to an irreducibly complex system is by definition nonfunctional." [Behe]
But read this argument carefully. Behe is not offering a way to detect design, he is offering a way to falsify gradual Darwinian evolution, and by elimination, conclude design. But there is one big problem- his falsifier has been falsified. The conclusion that an "irreducibly complex system cannot be produced gradually by slight, successive modifications of a precursor system" is simply wrong. There are at least three different ways that an IC system can be produced by a series of small modifications: 1) Improvements become necessities, 2) Loss of scaffolding 3) Duplication and divergence. By Behe's definition, many systems we see around us are IC, and yet have developed gradually. Think of the chaotic growth of towns into large cities, the self-organizing forces behind market economies, and the delicate causal webs that define complex ecosystems. Evolutionary algorithms run on computers routinely evolve irreducibly complex designs. So given an IC system, it could either be the product of coordinated design, or of a gradual, cumulative, stochastic process. The truth is, we should expect Darwinian evolution to produce such systems in biology, and not be surprised to find them. The underlying processes are called co-adaptation and co-evolution, and they have been understood for many years. Biochemical structures and pathways are not built up one step at a time in linear assembly-line fashion to meet some static function. They evolve layer upon layer, contingency upon contingency, always in flux, and retooling to serve current functions. The ability of life to evolve in this fashion has itself evolved over time. Detecting IC does not indicate design, and therefore Behe's hypothesis collapses. H. Allen Orr says it best in his perceptive review:
"Behe's colossal mistake is that, in rejecting these possibilities, he concludes that no Darwinian solution remains. But one does. It is this: An irreducibly complex system can be built gradually by adding parts that, while initially just advantageous, become-because of later changes-essential. The logic is very simple. Some part (A) initially does some job (and not very well, perhaps). Another part (B) later gets added because it helps A. This new part isn't essential, it merely improves things. But later on, A (or something else) may change in such a way that B now becomes indispensable. This process continues as further parts get folded into the system. And at the end of the day, many parts may all be required."
"The point is there's no guarantee that improvements will remain mere improvements. Indeed because later changes build on previous ones, there's every reason to think that earlier refinements might become necessary. The transformation of air bladders into lungs that allowed animals to breathe atmospheric oxygen was initially just advantageous: such beasts could explore open niches-like dry land-that were unavailable to their lung-less peers. But as evolution built on this adaptation (modifying limbs for walking, for instance), we grew thoroughly terrestrial and lungs, consequently, are no longer luxuries-they are essential. The punch-line is, I think, obvious: although this process is thoroughly Darwinian, we are often left with a system that is irreducibly complex. I'm afraid there's no room for compromise here: Behe's key claim that all the components of an irreducibly complex system 'have to be there from the beginning' is dead wrong." [*]
I think that is about all I need to say about that.
Get a grip Gore3000, if that's all you got, you got a BIG problem!!
[Any alternate hypothesis to "common descent" would have to address all the facts.] Actually no. In Darwin's own words: If it could be demonstrated that any complex organ existed, which could not possibly have been formed by numerous, successive, slight modifications, my theory would absolutely break down. " The words of Darwin you've quoted me are not in contradiction with the statement I made about the "common descent" hypothesis.
By Darwin's own terms, evolution has been disproven with Behe's bacterial flagellum.
Interestingly, "Darwin's own terms" are not necessarily the standard by which one would "disprove" "evolution". Darwin may have been wrong about "evolution", and (as far as I know) was wrong in some respects.
Of course, partially this is because there is no solid "theory of evolution" to speak of, there is just "philosophy of materialism". "Evolution" is materialism applied to biological history; whatever is learned about biological history now and in the future will still be lumped under "evolution".
This is in a way fine, because all that's going on is that scientists are taking a materialistic approach to the study of things, which is what they do. The only thing that bothers me about it is that, in the particular case of evolution for some reason, they resist (and quite irrationally so, often resorting to semantics and trying to borrow definitions of "truth" from other fields!) calling it a "theory".
It's really enough to make one wonder what the evolutionists are so damn scared of, if their "theory" is so solid.