I think we should be clear with this:
Denier: doesn't buy the entire premise of global warming, usually citing the data to be wrong. Conspiracy between scientists and politics.
Skeptic: Doubts that global warming is human made, or that CO2 is the issue.
Then it doesn't exist. Thanks for admitting it.
1) A single mutation is unlikely to provide twitch function. Assuming mutation provides a twitch function, this will be selected against unless there is a shortage of energy as the twitching bacteria will need more energy then the unmutated bacteria. So lets posit a photosynthetic bacteria where the twitch mechanism allows the bacteria to stay closer to the surface.
2) This step would be much easier and simpler then step 1. Given the competitive edge, mutations enhancing the promotor for the twitch protein would be selected for as those bacteria would be able to stay closer to the surface. Assume that the twitch protein is dense and naturally tends to the bottom of the cytoplasm, any changes that develop a flagellar 'nub' or extends it enhance the advantage.
3) I would add a few extra zeroes, maybe 14 billion generations. And if it was easy we would have done it in a lab by now.
Well I wouldn't throw myself in the ID camp... by analogy, humans are intelligent. We have designed cars, airplanes and submarines. Why haven't we made car-plane-marines? Specialization to fit an environment is a strength not a flaw. Obviously this example fits within evolutionary frameworks as well, crossovers such as amphibians aren't exactly thriving. For squishy, fairly weak sacks of meat humans have thrived awfully well through the last few thousand years
You didn't answer my question. Why did God make us squishy bags of meat that if not for technology would be near the bottom of the food chain, instead of hardy amphibious super-carnivores? And thank you for proving yet again that in your mind, if God didn't do it, it should be laughed at and ridiculed. I suppose that God must have taken a shit one day and POOF! there was all life on the planet.
@Rick: I had posed that question to Kharma. Thus far all of your responses have seemed well thought out and argued to me.
Plus could you point out your source because it's not entirely obvious? You point to a wiki article as if it proves some point you made. What is your point and what part of the article illustrated it?
I suspect we are primarily agreeing but you're perhaps even more annoying in agreement than you are in opposition.
its funny how karma resents being called a creationist, then brings up the irreducible complexity of the flagellum, THE (thoroughly debunked) flagship of ID proponents.
@doombringer - just what we need: hardy superstrong carnivorous amphibian humans. The species wouldn't have survived a century. We've done a fine enough job trying to kill ourselves off as weak squishy meatbags
Didn't I say someone else could look for it? The link to the wiki article was to point out that there's no mention of geneticists finding the abundant Neanderthal specific DNA, conclusively proving that Neanderthals weren't exterminated, but interbred. A feat supposedly impossible, with no basis for the conclusion, and taught in federally funded state universities...
My position, if you want to call it that, is that I haven't bought anything yet. Evolution is a likely possibility, looks to be plausible aside from the start, and unfortunately gets us no closer to explaining why the universe exists to begin with. That subject I'm much more interested in hearing an aswere to that isn't assinine. If not for the utterly ridiculous massive step and the theoretical jump involved, I'd be less inclined to consider it a tossup whether the planet was seeded by interdimensional aliens or something. Going from amino acids to self replicating life is way too big a step for me to buy it without proof.
I'm serious about someone else finding it. I can't remember any researcher names, can't remember the year it was published, the name of the paper, nothing... Trying a google search gives me a shitstorm of completely unrelated info, it will take hours on this connection.
My latest theory is that Charles Darwin the 30th centruy physicist develops a time travel machine, goes back to when his great great great grandsire postulated life began. After a couple hours he gets bored and leaves however the bacteria that he sheds at that time begin the development of life. Back in the 30th century Charles gets hit by a grav-bus and dies forever taking with him the secret to time travel.
You have to admit it solves the circular who created the creator dilemma. And is damn hard to debunk (granted it isn' t science)
And thus Life is resolved in a stable time loop! Now the debate can begin on the viability of Fighters in space combat.
I'm admitting no such thing. Teleology/anthropy = simply unprovable assertions. Since they can't be disproven, either, they may be appealing to some, but evolution explains the known facts far better than teleology or anthropy. Claiming that a watch can't occur in nature (or 'evolve') proves nothing.
Dykstra, don't play into what he's saying. The point is, he didn't answer the question. With all this baloney about "twitch function" and "nubs," he specifically ignored (and worse, may not have even understood) the fact that he needs to illustrate each small step in the chain, and then show how each small step provides some sort of benefit for natural selection to "select for." What he provided was laughable, or pathetic, not sure which.
Tell him to start with "twitch function," outline the parts in the machine that cause this twitch function, then as each part is added step by step, explain how that part is adding a benefit to be selected for. He won't do it, because he either can't do it, or he doesn't even understand the question or why its relevant.
I'm not sure if evolutionists just avoid attempting an answer because they know they will fail, or if they are so dumb that they actually believe their grotesquely simplified responses are an answer. Probably the latter.
1. I think it's a stupid, pointless, meaningless question. I mean, why not ask me about the price of cotton in China?
2. I don't know anything about your "God."
"Thoroughly debunked" (cough) and yet you can't debunk it or answer the question.
Right, so I am expected to provide a detailed diagram of the DNA of a bacteria and explain in detail why each mutation was selected over the standard genome while you get to stand around with your thumb up your butt saying "That's not what my mommy told me so you are wrong"? I dont think so. You can either make valid arguments or STFU and STFD.
But, like I said earlier, nobody is going to convince anybody who can't see past their own nose of anything and its obvious that you won't see past yours so I'm done here.
For a Ph.D. scientist making his evolutionary claims? Yes. Science requires no less.
But for you? As I said, a much simpler "major parts diagram" would suffice. The granularity I would accept would be small major parts that are not themselves machines, i.e. rotor, stator, bearing, u-joint, propeller, etc.
Agent of Kharma - 1DoomBringer90 - 0.
Anyone else?
Pot calling the kettle.
OK, let's add some basic mechanics. To evolve a 'twitch function' you would need an energy consuming peptide or protein that changes conformation on binding atp resulting in amp or adp maybe cytochrome based. Additionally this peptide needs to have affinity for the cell membrane as that needs to twitch. The energy peptide would likely be derived from mutations in the energy metabolism processes of the cell, probably mutations that would cause expression of a multipeptide, joining the energy peptide with a membrane associated peptide. Again I stress that multiple mutations would be required to do this. Each individual mutant would need to be viable and would probably be deselected in energy competition so this would have to occur in a region with plentiful nutrition. Ideally this DNA would be plasmid based so that it wouldn't interfere with the original peptide expression as that would likely be non-viable. Once this peptide appears it attachs to the membrane and as it absorbs energy, the conformational changes function as 'twitches'. Following that further mutations that enhance expression of the peptide, give more twitch. Assuming the proteins preferentially form on the lower surface of the membrane, any following mutations that perturb the membrane, maybe dimerism of the peptide, maybe changes to membrane proteins, would be miniature nubs. The nubs 'twitching' are a more useful use of energy and more directed then the un-nubbed cells. This would repeat until a flagellar structure is created.
Really the key point is that in an energy rich environment many mutations are not actively facing selection pressure. In my example the ideal route for this to occur would be for the energy source to be reduced after twitching has developed and the cells needs to compete at the point that the mutants receive a competitive advantage.
Note that this is theoretical and shows evolution not Evolution. It supports Evolution but only so far.
(sorry the molecular biologist in me woke up - adding some definitions)
peptide basically means protein
atp = adenosinetriphosphate (major source of cellular energy) adp - the diphosphate amp - the monophosphate
evolution - genetic change within a population, Evolution - Darwinian one cell to human in 93577486970483905676970976 easy steps evolution
First, what you are basically arguing is the "irreducible complexity" idea, generally championed by Michael Behe. It's based on the expectation that evolution can only add things, and that evolution has a direction. Fortunately, neither of those statements is true. Evolutionary changes can remove structures, or alter the shape or function of an existing one rather than just adding new ones. And evolution itself does not have a direction - most people seem to think that evolution must always select for the more complex solution. Humans are not any more "highly evolved" than any of the micro organisms our intestines play host to - quite the opposite, in fact.
And while it is granular and simplistic, and indeed isn't the outboard motor you wanted explained, this does explain how you could get a simple "irreducibly complex" stone bridge with direct evolutionary steps. The link provided in it gives a good explanation of how soil bacteria can evolve an "irreducibly complex" mean of digesting a particular toxin.
[edit] I need to type faster, or check myself less. But yes, it does seem that the concept of a neutral mutation (one that neither helps nor hinders organisms) is beyond Kharma's grasp.
Just to clarify - evolution by mutation has no direction, evolution by selection is directed to specialization to meet the constraints of the selection pressure (or despecialization from a now unfavored state)
This specialization is what people call "highly evolved" and Willy is right it is found and created much easier in prokaryotes.
Evolution is characterized at least in speciation terms by population splits followed by facing different selection pressures leading to specialization into eventually non-sexually compatible species.
And also as the changes can be deletions as well as additions (every change could be undone), Evolution theory by definition allows for the possiblity that the entire process could be repeated backwards and the possibility exists that a human population could evolve back to the original single cell organism. (Don't try to calculate the odds of this )
This thread has become quite pathetic, y'know... people trying to deny evolution by strawman attacks against abiogenesis, cosmogeny and, of all things, electrical motors, ignoring information and redefining words to suit their own world-views, and a complete and utter failure to understand science in general, mathematics, biology, chemistry, physics or even philosophy and logic.
Some of you seem honestly ignorant and curious, but the behavior of others really, really cannot be explained by means other than "he's a freaking troll".
Want me to be convinced otherwise? formally define the word "evolution" to me. No cop-outs, no "I'm using it the same as everybody else is using", no "you should know already", just a formal declaration of your own, personal definition. No other questions, explanations, links to peer-reviewed papers, that is all, a simple definition. Hell, cut-n-paste it if you want, as long as you're willing to state "this is what I believe the word to mean".
Go ahead, I'll be waiting.
http://news.bbc.co.uk/2/hi/7886477.stm
If this is any guide then I would have to say nothing has yet to be conclusively decided.
Why in god's name does this even matter? So what if the neanderthals were simply out competed for their diet which was exclusively meat from large game and they were unable to adapt once their herds of mammoth were killed off, or if we simply killed them off and ate them or we fucked them to death (i.e. interbred), or all of the above? We'll find out sooner or later, in the meantime what essential part of your world view hinges on the true fate of the neanderthal?
You do understand that all things are not instantly knowable, don't you? I mean that's why we invented the concept of god. Anything that's currently unknown can be attributed to god and gradually over time we push back the edges of our ignorance and increase our understanding and reduce our dependence on witch doctors.
Sometimes, I don't know is the best answer there is at the moment, it seems you have great difficulty with that.
I find this really funny. That you should start out invoking God's name (as if you believe in God), only to later say the invoked deity is an invented concept. How hypocritical!
I find this even funnier. The concept that 'we' will eventually know everything there is to know, when all of us alive today will be dead and forgotten in a very few short years. Do you really think that any single person could ever have such knowledge and understanding?
Even in a composite whole, there are things that were known thousands of years ago that are lost to those of more recent times.
And your use of "god" (vs. "'a' god") would suggest that you really do believe in a single all-powerful God, but are in denial of said Being because of what it would mean to the belief system that you wish to believe in.
I pity you, Mumblefratz - because you are so conflicted between what you actually believe (in your heart), and what you so desperately want to believe in (in your mind).
DraekAlmasy
[quote]formally define the word "evolution" to me. No cop-outs, no "I'm using it the same as everybody else is using", no "you should know already", just a formal declaration of your own, personal definition[/quote]
From Post 89
evolution - a change in the allelic frequency of a population
Definition 1 can be proven to occur as per the examples above although the explanations are incorrect. Taking a bacterial culture and exposing it to an antibiotic agent does not create a mechanism for tolerance, the mechanism must exist and the genetic basis for tolerance will be present in some percentage of the population. Exposure to a level of the antibiotic that is not immediate fatal to the organism will result in the expression of the "tolerance protein" the non-tolerant bacteria are killed and the culture will show a dramatic selection in favor of the allele.
Darwinian theory of evolution - the theory that all living organisms have evolved from a common ancestor
paraphrased in Post 189 above as well
These ARE the definitions of evolution. If we're going to allow everyone to apply their own definitions then this discussion has nothing to do with science, philosophy or logic.
Now riddle me this, how is an attack (strawman or otherwise) on abiogenesis an attempt to "deny evolution"? We have made amino acids in lab conditions, as for the rest of the process there isn't even a theory. Also note that the theory of evolution does not attempt to define the creation of life, but starts at the rather more vague "common ancestor".
Lets add a codicil - ID and creationism are faith based theories of human origins. As this discussion is science based no appeals to either philosophy are particularly relevant. Also no claims of "anyone against evolution is a raving lunatic, just look at ID/creationism" are relevant.
Are you insulting my witch doctor ?
No, seriously, my doctor is a wiccan and I do depend on her so please play nice with the references.
EDIT: Yes this is a bit of a poke at the, lets all take our own definitions, let the semantic twisting begin, and have a nice argument post. I keep forgetting subtlety and the internet don't mix well.
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]
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.
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]
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]
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]
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]
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]
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.
As is true with many of the arguments marshalled against evolution, it's attractive, compelling, and easily made. And it's completely wrong.
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
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
Technically I’m an agnostic which means that while I don’t particularly believe in the existence of any particular god, I also acknowledge that I can’t necessarily prove that such a god doesn’t exist. As far as invoking the name of god it’s merely a technique to add a bit of emphasis to a question.
But specifically in regard to the major religions of the world I’m pretty well convinced that none of them can possibly be correct. My reasoning is that pretty much all of the world’s major religions are in some sense mutually exclusive. If you are a christian (note the lowercase) then you believe that you are “saved” and muslims (again lowercase) are damned. If you’re muslim then the opposite is true.
Given that where you are born is the sole determinate of what religion you are in 99.9% of all cases then if any one religion is correct that implies that all other religions are wrong and their adherents are therefore damned.
I personally refuse to accept a god that essentially damns the bulk of the world’s population simply because of where a person was born. This leads me to conclude that *all* of the world’s religions are incorrect and *if* a god really does exist then religion, which after all is a man made construct, is meaningless.
However I do accept that many of the concepts of the world’s religions which do seem to be fairly universally held are indeed words to live by. Basically this boils down to what is really important is not what building you go to once a week or what words you mutter under your breath but how you treat your fellow man.
Anyway that’s the way I view it, but as I said I’m an agnostic which literally means I don’t know, and so while I doubt your view of religion or god could in fact be correct, I have no proof that it isn’t.
However, I do find the idea that man created god as an explanation for the unknown to be a much more likely possibility. The fact that religion later turns out to be “an opiate of the masses” that can be conveniently used by those in power to get those not in power to accept their lot is just a lucky happenstance that contributes to the continued existence of church and religion.
Mostly what I see are people telling me that *they* know what god wants *me* to do and it always seems like what god wants me to do is to give *them* money, how convenient. I also see the Bush’s and Cheney’s of the world make a big show of going to church on Sunday however their true religious experience is when they go to the bank on Monday.
It is difficult to overcome the brainwashing you received as a child but I can assure you that I have. I pity your pity. My choice of Martin Luther as an avatar was because a pasty faced somewhat pudgy white guy with absolutely no sense of humor whatsoever suited my personality and has nothing to do with any “desperate” desire to be brainwashed.
Um.. actually I am a Christian and my religion dictates nothing of the sort, in fact we do not believe in a god that would unfairly damn or condemn anyone, whether because of how they were raised, where, or into what religion they were born, or for any other reason. Also just being a Christian isn't enough to be saved, I have to live it and mean it, not just go through the motions to ease a guilty conscience or for whatever other reason. As far as paying the Church money, all of it goes to helping others, or to maintain the buildings, or disaster relief or whatever else, none of it is taken or used to pay church leaders.
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