QUOTE(IamsSon @ Oct 18 2006, 12:54 AM) [snapback]1394328[/snapback]
That sounds acceptable. So, first question, why is Irreducible Complexity fail the scientific theory test?
Well, to answer this, we first have delve a little into the implications of Irreducible Complexity. The fundamental concept of IC is that there are certain organic devices so complex that they must have been created by an intelligence, as opposed to having arisen through random evolutionary means. What means, then, is that these devices are made up of components whose only purpose can be to power the device they make up. They cannot have any other job, or previous existance, or the argument loses its foundation. According to IC, a pocke****ch is made by an intelligence, and the gears and springs within it are specifically designed for that watch to work.
But now we run into a problem with the first pre-requisites of scientific methodology. "A theory needs to explain the currently existing data". The existing data that we have shows these metaphorical gears and springs being used for different purposes. For instance, Behe's infamous 'rotor' flagellum is, in a previous bacterium, identical in all but function, where it serves as a food gathering device. This is a problem. IC claims that the creation of a rotor can only be explained by assuming an intelligence behind it, and this implies that the individual components must have been placed there in order to achieve the creation of the roto, but suddenly we find one component which has a function entirely different than the one it was, according to IC, designed for.
Then we have the issue of predicatability. Exactly what is predictable with IC? Due to the wording, not a great deal. The very quality that makes it such a favorite among creationists dooms it as a scientific theory. IC claims that some complex devices are intelligently designed. We have no way to determine which devices are intelligently designed, and which are not. At most, all we can do is look at the individual components and claim that they could not be individually found to have arisen by chance, but then you are essentially saying that, because we do not know now how these things came about, we never will. This is a logical fallacy, the same one which doomed Behe's argument (except that when Behe claimed (and still does) that the working of the flagellum rotor is an evolutionary mystery, several papers written by biologists describing the functions, history, and evolution, of the rotor had already been published).
The third prerequisite is a little trickier. The theory must be logical enough so that an unbiased third party could arrive at it. The key here is to understand the difference between unbiased and unqualified. Unbiased third party does not mean someone who is ignorant of scientific methods, methodology, research, and procedure. I can be argued (and often is), that a scientists working in the confines of the current academic system is naturally biased, but that is an entirely different argument, and not this one, which is concerned only with how a given hypothesis does not meet scientific standards. But, to be perfectly fair, reasons for rejecting IC in terms of logic should not (they do, but for the sake of fairness) stand on existing knowledge, but rather logic, so this is where Irreducible Complexity fails logically. Irreducible Complexity assumes that complexity is the sign of intelligence. This is not the case. Complexity is not the sign of intelligence; simplicity is.
How does that work? Let me give you an example: Let's say that you are walking alongside a river. You pick up a river pebble and look at it. What would it take for you to re-create that pebble? You would need to measure every single angle, curve, and crevice, every crack, vein and scar. You would need to find out the mass, and if the density changes. You would need to map out all the different colors and variations, and even textures. Trying to re-create this rock as, say, a 3-D computer image would be complex to say the least. A skilled draftsman would have to take hours, possibly days to come up with the results. The reason for this is, quite simply, that this pebble is the end result of millions of random chances.
But what if you picked up a pebble, and it was perfectly spherical? A nice, shiny, smooth, black marble. How long would it take this one to be recreated? A first-year student could plug in the equation for a sphere in seconds [(4(Pi)R^2)]. Add a note for color, texture, and mass, and you are done. The entire process took our skilled draftsman less than five minutes.
So, the question becomes this: Which pebble do you believe was intelligently designed? The complex one, or the simple one? Which on would logic dictate?
The fourth pre-requisite is also the newest pre-requisite on the list, added just this centure. A theory, in order to be a theory, must be falsifiable. There must be a way to show that the theory is not true. In the case of IC, again, due to the wording, this cannot be done. IC posits that some organic devices are too complex and must have been assembled by an intelligence. There is no way to disprove this. Can we disprove this by showing how a device is designed by chance? No, because that still means that some device out there is intelligently designed. No, because then we fall into the assumption that we know all that there is to know. If there is no way to show that the theory can be falsified, then it becomes logically invalid.
And finally, the explanation offered must be a verifiable event. There must be some way to confirm that what was said to happen actually happened. In the case of IC, again, this becomes impossible. Thanks to the wording of IC, we have no idea what this "intelligence" is, or how we would detect it. There is, in actuality, no explanation offered here, becaude by defintion, and explanation guides us through the process, whereas the only thing IC offers is a postulate, a statement of belief "An intelligence created it", which is no more an explanation than "God did it." It is nothing more than a matter of faith, not an explanation.
In this particular case, Irreducible Complexity fails all five pre-requisites. It is important to note, however, that in order to be invalid as a scientific theory, you only need to fail one. This hasn't even gotten into the factual, conceptual, and logical errors involved in the review of an actual, valid theory; this is still the preliminaries, and Irreducible Complexity can't even meet these standards.