Another big problem I have with evolution (there are so many) is that there is no mechanical process which can "evolve" an organism into another organism. Let's just use a hypothetical example - a snake-like creature with no arms, and we want to transform it into more of a lizard-like creature with arms and legs. How would this happen according to evolution?
Perhaps an appendage such as an arm or a leg would start with a mutation which forms a "bump" at the site of the future appendage. Evolutionists would say that this bump would, over millions of years, transform into the appendage. But how, through magic? There has to be a mechanism. "Natural selection is the mechanism" evolutionists claim, but let's examine it critically - something that evolutionists always fail to do.
Evolution states that any mutation must be beneficial to the organism in order for natural selection to "select for" that mutation. The mutant cheetah which is faster catches his prey better, thus survives better, thus passes on his genes better. This makes sense. But what is the benefit of the useless bump which has just formed on our snake? Nothing. In fact, if anything it is a detriment and would be "selected out" by natural selection, not "selected for."
It is impossible to build up a complex machine piece by piece through evolution because, until the machine is fully-formed, it doesn't do anything beneficial for the organism, and in fact is a detriment and would always be selected out according to the theory. Imagine trying to evolve the flagellum on the end of a bacteria - something that e. coli and other bacteria possess. It is an electric outboard rotary moter. It possesses a rotor, a stator, a u-joint, etc. - all the parts that an electric outboard motor possesses. So start with an e. coli which doesn't have this. How do you build this thing for the e. coli step by step according to evolution? What part are you going to evolve first? The u-joint? The rotor? The stator? The propeller (tail?)?
You can start anywhere, but for the sake of argument let's start with the propeller (tail). Let's say a mutation happened which formed a tail on the end of the bacteria (it's worse than that because the tail would actually start as a bump, but I'll give you evolutionists a head start to make it easier on you). WHAT'S THE BENEFIT? It doesn't do anything yet, because the rest of the outboard motor hasn't evolved yet. IT'S NON-FUNCTIONING DEAD WEIGHT, IT IS A DETRIMENT BECAUSE IT TAKES RESOURCES TO FORM IT THAT COULD HAVE GONE SOMEWHERE ELSE, IT WOULD BE SELECTED OUT BY NATURAL SELECTION.
EVOLUTION AND NATURAL SELECTION CANNOT BUILD YOU A MACHINE STEP BY STEP. Just a tiny bit of critical thinking is all that is needed to see that the mechanism fails.
To all the evolutionists arguing on this thread, go ahead. Show us how to build a machine step by step using your theory. YOU HAVE TO EVOLVE EACH PIECE - no evolution of whole working machines at once. And you have to show at each step of the process WHAT THE BENEFIT IS so that natural selection can "select for" the mutation.
Go ahead, we are waiting.
GOD are you intentionally dumb? Have you ever read non ID-sites about evolution?
Like intelligent design, the concept it seeks to support, irreducible complexity has failed to gain any notable acceptance within the scientific community. One science writer called it a "full-blown intellectual surrender strategy."[58]
[edit] Reducibility of "irreducible" systems
Potentially viable evolutionary pathways have been proposed for allegedly irreducibly complex systems such as blood clotting, the immune system[59] and the flagellum,[60][61] which were the three examples Behe used. Even his example of a mousetrap was shown to be reducible by John H. McDonald.[36] If irreducible complexity is an insurmountable obstacle to evolution, it should not be possible to conceive of such pathways.[citation needed]
Niall Shanks and Karl H. Joplin, both of East Tennessee State University, have shown that systems satisfying Behe's characterization of irreducible biochemical complexity can arise naturally and spontaneously as the result of self-organizing chemical processes.[62][63] They also assert that what evolved biochemical and molecular systems actually exhibit is "redundant complexity"—a kind of complexity that is the product of an evolved biochemical process. They claim that Behe overestimated the significance of irreducible complexity because of his simple, linear view of biochemical reactions, resulting in his taking snapshots of selective features of biological systems, structures and processes, while ignoring the redundant complexity of the context in which those features are naturally embedded. They also criticized his over-reliance of overly simplistic metaphors, such as his mousetrap. In addition, research published in the peer-reviewed journal Nature has shown that computer simulations of evolution demonstrate that it is possible for irreducible complexity to evolve naturally.[64]
It is illustrative to compare a mousetrap with a cat, in this context. Both normally function so as to control the mouse population. The cat has many parts that can be removed leaving it still functional; for example, its tail can be bobbed, or it can lose an ear in a fight. Comparing the cat and the mousetrap, then, one sees that the mousetrap (which is not alive) offers better evidence, in terms of irreducible complexity, for intelligent design than the cat. Even looking at the mousetrap analogy, several critics have described ways in which the parts of the mousetrap could have independent uses or could develop in stages, demonstrating that it is not irreducibly complex.[37][36]
Moreover, even cases where removing a certain component in an organic system will cause the system to fail do not demonstrate that the system couldn't have been formed in a step-by-step, evolutionary process. By analogy, stone arches are irreducibly complex—if you remove any stone the arch will collapse—yet we build them easily enough, one stone at a time, by building over centering that is removed afterward. Similarly, naturally occurring arches of stone are formed by weathering away bits of stone from a large concretion that has formed previously. Evolution can act to simplify as well as to complicate. This raises the possibility that seemingly irreducibly complex biological features may have been achieved with a period of increasing complexity, followed by a period of simplification.
In April 2006 a team led by Joe Thornton, assistant professor of biology at the University of Oregon's Center for Ecology and Evolutionary Biology, using techniques for resurrecting ancient genes, scientists for the first time reconstructed the evolution of an apparently irreducibly complex molecular system. The research was published in the April 7 issue of Science.[5][65]
It may be that irreducible complexity does not actually exist in nature, and that the examples given by Behe and others are not in fact irreducibly complex, but can be explained in terms of simpler precursors. There has also been a theory that challenges irreducible complexity called facilitated variation. The theory has been presented in 2005 by Marc W. Kirschner, a professor and chair of Department of Systems Biology at Harvard Medical School, and John C. Gerhart, a professor in Molecular and Cell Biology, University of California, Berkeley. In their theory, they describe how certain mutation and changes can cause apparent irreducible complexity. Thus, seemingly irreducibly complex structures are merely "very complex", or they are simply misunderstood or misrepresented.
[edit] Gradual adaptation to new functions
The precursors of complex systems, when they are not useful in themselves, may be useful to perform other, unrelated functions. Evolutionary biologists argue that evolution often works in this kind of blind, haphazard manner in which the function of an early form is not necessarily the same as the function of the later form. The term used for this process is "exaptation". The mammalian middle ear (derived from a jawbone) and the panda's thumb (derived from a wrist bone spur) are considered classic examples. A 2006 article in Nature demonstrates intermediate states leading toward the development of the ear in a Devonian fish (about 360 million years ago).[66] Furthermore, recent research shows that viruses play a heretofore unexpectedly great role in evolution by mixing and matching genes from various hosts.[citation needed]
Arguments for irreducibility often assume that things started out the same way they ended up—as we see them now. However, that may not necessarily be the case. In the Dover trial an expert witness for the plaintiffs, Ken Miller, demonstrated this possibility using Behe's mousetrap analogy. By removing several parts, Miller made the object unusable as a mousetrap, but he pointed out that it was now a perfectly functional, if unstylish, tie clip.[37][67]
[edit] Falsifiability and experimental evidence
Some critics, such as Jerry Coyne (professor of evolutionary biology at the University of Chicago) and Eugenie Scott (a physical anthropologist and executive director of the National Center for Science Education) have argued that the concept of irreducible complexity, and more generally, the theory of intelligent design is not falsifiable, and therefore, not scientific.
Behe argues that the theory that irreducibly complex systems could not have been evolved can be falsified by an experiment where such systems are evolved. For example, he posits taking bacteria with no flagellum and imposing a selective pressure for mobility. If, after a few thousand generations, the bacteria evolved the bacterial flagellum, then Behe believes that this would refute his theory.[citation needed]
Other critics take a different approach, pointing to experimental evidence that they believe falsifies the argument for Intelligent Design from irreducible complexity. For example, Kenneth Miller cites the lab work of Barry G. Hall on E. coli, which he asserts is evidence that "Behe is wrong."[68]
Other evidence that irreducible complexity is not a problem for evolution comes from the field of computer science, where computer analogues of the processes of evolution are routinely used to automatically design complex solutions to problems. The results of such Genetic Algorithms are frequently irreducibly complex since the process, like evolution, both removes non-essential components over time as well as adding new components. The removal of unused components with no essential function, like the natural process where rock underneath a natural arch is removed, can produce irreducibly complex structures without requiring the intervention of a designer. Researchers applying these algorithms are automatically producing human competitive designs—but no human designer is required.[69]
[edit] Argument from ignorance
Intelligent design proponents attribute to an intelligent designer those biological structures they believe are irreducibly complex and where a natural explanation is absent or insufficient to account for them.[70] However, critics view irreducible complexity as a special case of the "complexity indicates design" claim, and thus see it as an argument from ignorance and God of the gaps argument.[6]
Eugenie Scott, along with Glenn Branch and other critics, has argued that many points raised by intelligent design proponents are arguments from ignorance.[71] Behe has been accused of using an "argument by lack of imagination", and Behe himself acknowledges that a failure of current science to explain how an "irreducibly complex" organism did or could evolve does not automatically prove the impossibility of such an evolution.
Irreducible complexity is at its core an argument against evolution. If truly irreducible systems are found, the argument goes, then intelligent design must be the correct explanation for their existence. However, this conclusion is based on the assumption that current evolutionary theory and intelligent design are the only two valid models to explain life, a false dilemma.[72][73]
[edit] Irreducible complexity in the Dover trial
While testifying at the Kitzmiller v. Dover Area School District trial Behe conceded that there are no peer-reviewed papers supporting his claims that complex molecular systems, like the bacterial flagellum, the blood-clotting cascade, and the immune system, were intelligently designed nor are there any peer-reviewed articles supporting his argument that certain complex molecular structures are "irreducibly complex."[74]
In the final ruling of Kitzmiller v. Dover Area School District, Judge Jones specifically singled out Behe and irreducible complexity:[74]
- "Professor Behe admitted in "Reply to My Critics" that there was a defect in his view of irreducible complexity because, while it purports to be a challenge to natural selection, it does not actually address "the task facing natural selection." and that "Professor Behe wrote that he hoped to "repair this defect in future work..." (Page 73)
- "As expert testimony revealed, the qualification on what is meant by "irreducible complexity" renders it meaningless as a criticism of evolution. (3:40 (Miller)). In fact, the theory of evolution proffers exaptation as a well-recognized, well-documented explanation for how systems with multiple parts could have evolved through natural means." (Page 74)
- "By defining irreducible complexity in the way that he has, Professor Behe attempts to exclude the phenomenon of exaptation by definitional fiat, ignoring as he does so abundant evidence which refutes his argument. Notably, the NAS has rejected Professor Behe’s claim for irreducible complexity..." (Page 75)
- "As irreducible complexity is only a negative argument against evolution, it is refutable and accordingly testable, unlike ID [Intelligent Design], by showing that there are intermediate structures with selectable functions that could have evolved into the allegedly irreducibly complex systems. (2:15-16 (Miller)). Importantly, however, the fact that the negative argument of irreducible complexity is testable does not make testable the argument for ID. (2:15 (Miller); 5:39 (Pennock)). Professor Behe has applied the concept of irreducible complexity to only a few select systems: (1) the bacterial flagellum; (2) the blood-clotting cascade; and (3) the immune system. Contrary to Professor Behe’s assertions with respect to these few biochemical systems among the myriad existing in nature, however, Dr. Miller presented evidence, based upon peer-reviewed studies, that they are not in fact irreducibly complex." (Page 76)
- "...on cross-examination, Professor Behe was questioned concerning his 1996 claim that science would never find an evolutionary explanation for the immune system. He was presented with fifty-eight peer-reviewed publications, nine books, and several immunology textbook chapters about the evolution of the immune system; however, he simply insisted that this was still not sufficient evidence of evolution, and that it was not "good enough." (23:19 (Behe))." (Page 78)
- "We therefore find that Professor Behe’s claim for irreducible complexity has been refuted in peer-reviewed research papers and has been rejected by the scientific community at large. (17:45-46 (Padian); 3:99 (Miller)). Additionally, even if irreducible complexity had not been rejected, it still does not support ID as it is merely a test for evolution, not design. (2:15, 2:35-40 (Miller); 28:63-66 (Fuller)). We will now consider the purportedly “positive argument” for design encompassed in the phrase used numerous times by Professors Behe and Minnich throughout their expert testimony, which is the “purposeful arrangement of parts.” Professor Behe summarized the argument as follows: We infer design when we see parts that appear to be arranged for a purpose. The strength of the inference is quantitative; the more parts that are arranged, the more intricately they interact, the stronger is our confidence in design. The appearance of design in aspects of biology is overwhelming. Since nothing other than an intelligent cause has been demonstrated to be able to yield such a strong appearance of design, Darwinian claims notwithstanding, the conclusion that the design seen in life is real design is rationally justified. (18:90-91, 18:109-10 (Behe); 37:50 (Minnich)). As previously indicated, this argument is merely a restatement of the Reverend William Paley’s argument applied at the cell level. Minnich, Behe, and Paley reach the same conclusion, that complex organisms must have been designed using the same reasoning, except that Professors Behe and Minnich refuse to identify the designer, whereas Paley inferred from the presence of design that it was God. (1:6- 7 (Miller); 38:44, 57 (Minnich)). Expert testimony revealed that this inductive argument is not scientific and as admitted by Professor Behe, can never be ruled out. (2:40 (Miller); 22:101 (Behe); 3:99 (Miller))." (Pages 79–80)
The Mousetrap Analogy
or
Trapped by Design
In their continuing efforts to make a case for the "intelligent design" of biochemical systems, Michael Behe and others have compared such systems to mousetraps. By invoking an ordinary object like the mousetrap, they hope to explain their concept of "irreducible complexity" in terms that people can easily grasp. Here's an example of how this comparison is made:
"A good example of such a system is a mechanical mousetrap. ... The mousetrap depends critically on the presence of all five it its components; if there were no spring, the mouse would not be pinned to the base; if there were no platform, the other pieces would fall apart; and so on. The function of the mousetrap requires all the pieces: you cannot catch a few mice with just a platform, add a spring and catch a few more mice, add a holding bar and catch a few more, All of the components have to be in place before any mice are caught. Thus the mousetrap is irreducibly complex." [MJ Behe, 1998, "Intelligent Design Theory as a Tool for Analyzing Biochemical Systems," in Mere Creation, p. 178]
No Simpler Mousetrap?

(Below) John MacDonald's drawings of a standard 5-part mousetrap, following by a series of simpler mousetraps with 4, 3, 2, and finally, just 1 part.

See Original Document at:
http://udel.edu/~mcdonald/mousetrap.html
|
As is true with many of the arguments marshalled against evolution, it's attractive, compelling, and easily made. And it's completely wrong.
The Mousetrap Argument has a Fatal Flaw |
If parts of a mechanical machine like a mousetrap can be used for different purposes, then portions of any "irreducibly complex" biochemical machine can be fully-functional in other biochemical contexts as well. This means that Behe's argument against evolution fails, because the entire machine need not be assembled for natural selection to produce its individual parts. |
|
A series of drawings made by John MacDonald at the University of Delaware (left) show just how quickly the assertions behind Behe's mousetrap analogy collapse upon inspection. It it remarkably easy to construct a mousetrap with just 4 parts, 3 parts, or even a mousetrap with just one part. As MacDonald himself was careful to note, none of these contraptions are nearly as good as the standard 5-part mousetrap, but that's exactly the point. Working mousetraps don't have to have each of the 5 standard parts to be functional. If they have fewer parts, they can still be made to work.
Michael Behe was so concerned about MacDonald's drawings (and my use of them in a talk in June of 2000) that he wrote a specific rebuttal called "A Mousetrap Defended."
As is usual with Behe's rebuttals, it completely misses the point of the argument. Behe argues that MacDonald's four simpler mousetraps do not present a good model of a "Darwinian process." Even the simplest mousetrap, Behe argues, requires "the involvement of intelligence," and the "involvement of intelligence at any point in a scenario is fatal."
I agree. And if I or MacDonald or any one else had ever presented the simpler mousetraps as examples of an evolutionary transition, Behe would be right.
However, that's not the point of the argument.
Rather, MacDonald's drawings address Behe's contention that "all components have to be in place before any mice are caught." They don't, of course, because there is more than one way to construct a mousetrap from mechanical parts. Why is this worth pointing out? Because Behe uses the mousetrap analogy to "prove" that biochemical machines, also composed of multiple parts, could not possibly have originated from simpler assemblies. The simpler assemblies don't work, according to Behe. But MacDonald has shown that simpler mousetraps do work, and therein lies the danger to Behe's ideas.
If simpler versions of this mechanical device can be shown to work, then simpler versions of biochemical machines could work as well ... and this means that complex biochemical machines could indeed have had functional precursors... something that Behe asserts could not have happened.
|
In spending so much energy showing that this sequence of mousetraps could not have "evolved," Behe misses the whole point of MacDonald's demonstration. In fact, he also overlooks the most important error in his mousetrap argument, which is his contention that function is abolished by removing any part of an "irreducibly complex" system. At the very same conference, I removed two parts from a mousetrap (leaving just the base, spring, and hammer), and used that 3-part device as a functional tie-clip. I then detached the spring from the hammer, and used the device as a keychain. If I had cared to, I might have used the base and spring (2 parts) as a paper clip, my tie clip (glued to a door) as a door knocker, the catch as a toothpick, or the base as a paperweight.
As these examples show, portions of a supposedly irreducibly-complex system may be fully-functional in other contexts, and this is the biologically relevant part of the argument. Behe argues that natural selection cannot favor the evolution of a non-functional system (which is true), and then argues that no portion of an "irreducibly complex" system (such as a mousetrap) could have any function. As my 3-part tie clip shows, that's false, and it's false in a biologically-relevant way. If portions of a multipart biochemical are useful within the cell in performing other useful functions, then evolution has a perfectly reasonable way to put the parts of such machines together. This is, incidentally, exactly the case for the very systems that Behe cites. The microtubules, cross-bridges, and linking proteins of the eukaryotic cilium (to use one of his favorite examples) each have other functions within the cell that would favor their production by natural selection.
In showing that it is possible to use part of a mousetrap for a different purpose, one shows by analogy that it is also possible to use part of a biochemical system for a different purpose. That's the fatal danger of the mousetrap analogy for Behe's argument, and it has become a trap from which he cannot escape.
Kenneth R. Miller
Professor of Biology
Brown University
Providence, RI 02912