Thanks for the response. Just a couple of really quick comments, since you've addressed something to me.
August wrote:
You have taken a definitional sufficiency position on the role of irreducible complexity. What you wrote was that if it is irreducibly complex, then it is designed. This argument is useful for determining inclusivity, but not exclusivity (i.e., for deterimining what is not intelligently designed). A definitional necessity statement would read: If it is designed, then it is irreducibly complex. Would you agree that that is true?
I cvannot find any disagreement with that, but it may just be an issue of what the question is. Designers re-use parts and subsystems all the time, so if we look at any system, we will find things there that have uses other than in that system. Of course, we then get back at the point where it all starts, in the case of biology, what is the origin of life?
Neither ID nor the theory of evolution attempt to explain the origin of life. That question is off-topic.
The current status of our Universe is highly improbable if one were to have specified at the outset this exact set-up. In other words, the probability of getting
any complex system is nearly infinitely higher than getting a
particular complex system. This is one of nearly infinitely many complex systems that could have been produced. I don't see a reason to assume that anyone specified that
this and only this set of infinite parameters would count as a successful complexity.
August wrote:The question of inclusivity vs exclusivity seems to be addressed by probability.
It is not. Probability is expressed on an infinitely graduated continuum from 0 to 1. (Of course, you can also express it as a ratio between any two real numbers, so long as you don't divide by zero.) It is still wholly unclear where a researcher should draw the line between complex and too complex.
August wrote:I have not seen any absolute measures for what is designed vs what is not, it is rather determined by what is the probability of a system being the result of naturalistic mechanisms or not.
The lack of objective (or absolute) measures bespeaks the untestability of the claims. It can't be tested until the terms are objectively defined. Heck, it's a theory of intelligent design and the major proponents still don't have a way to determine what counts as "designed" and what doesn't? I'm a statistician. You can take my word for it (or contact me offline for an explanation) that the probabilities you mention here are wholly incalculable. You would have to know the nature, location, and velocity of every particle in the Universe. You would also have to know that this specific permutation of matter and energy was the
intended permutation and that other permutations would not have been complex. You would have to be able to determine how many other complex permutations were possible that might also have appeared to be intelligently designed. Of course, that's all moot if we lack an objective rule to distinguish between designed and not designed. I hope someone will let me know when they finish calculating all the possible permutations of mass and energy as well as the number of permutations that would be complex, but would differ from
this complex permutation.
When the Wright brothers set out to create a flying machine, there were any number of complex designs that would have been successful. They could have built an F-18. They could have built a Piper Cub. They could have built a Boeing 777. They could have built any number of other complex designs we have yet to create. Had they created an AV8 Harrier, it is doubtful that someone would have said, "Sorry fellas; that's not the type of complexity I specified." Thus, a nearly infinite number of complex designs would have been successful. Likewise, there is a nearly infinite number of complex ways of arranging the contents of the Universe. There is no reason to assume that someone specified at the beginning of the Universe (or maybe just the beginning of life on Earth) that only this specific Universal permutation would count as the
right complex design.
Just because something works
really well for a purpose doesn't mean it was
intended for that purpose. Ever hammer in a tent stake with a rock? It works pretty well. Is that the primary function of a rock? I guess it depends on whether or not you need a hammer. This concept of functional intent is worthless, untestable, and unnecessary. Function is a perception, not a percept.
August wrote:After all, gentically imperfect organisms do breed, they just don't survive.
This presupposes some idea of genetic perfection. Most organisms are genetically unique. Mutations that do not impede reproductive success are, by definition, at least as likely as other genes to be passed along to offspring.
August wrote:It also does not answer another question, how do those mutations accumulate in a complete biocosm so as to have an effect on a population rather than an individual? If those mutations were to accumulate and later on form a beneficial function, it would have to survive and similarly develop over multiple generations in a population, and then somehow have a combined effect in one common ancestor to then spread via the other naturalistic mechanisms to the population.
I would say "at least one common ancestor". It really only takes one to pass along a given allele frequency and the trait has taken root.
August wrote:I have not seen any evidence for this in the couple of experiments I have read about, fruit flies and e-coli. Over multiple thousands of generations with extraordinary environmental circumstances, there was no changes to the morphology or any increases in complexity.
Nevermind technical speciation of a mule, one example is the undirected emergence of two new species in the last 50 years: Tragopogon mirus and Tragopogon miscellus.
Roose and Gottlieb, 1976, Genetic and Biochemical Consequences of Polyploidy in Tragopogon, Evolution 30: 818 - 830
August wrote:Improbable is a long way from impossible, but then, as you stated, we are discussing probability.
You are asserting the role of probability in determining what is or is not "too complex" to be explained by natural causes. I do not pretend to know the extent of the "abilities" of nature as you seem to.
August wrote:At what point does something become so improbable that it is considered impossible?
By definition, when the probability reaches 0. In any case, I've already reviewed the fact that these are incalculable probabilities.
August wrote:And while there may have been many opportunities for this to happen, it had to happen many millions of times.
And about how many times would you say cells have reproduced in the last 15 billion years?
August wrote:ncooty wrote:What's something that has no evolutionary pathway leading to the system? (Again, this seems to state a dichotomous decision implicitly: either evolution can explain it or ID must be right. I would argue that this is a false dichotomy. Moreover, I don't understand why we keep getting dragged back into a reliance on falsification of evolutionary theory as a way to support ID.)
Well, I'm sure that many would love to hear your theory on how this is a false dichotomy. My opinion is that we have only two choices, either everything came about by natural causes, or there was an intelligent agent. Would you care to add some other options?
There are a number of logical problems here. First, you have implicitly equated my statement of evolutionary theory with "natural causes". There are many other theories of natural causation besides a Darwinian (or even neo-Darwinian perspective). You just don't hear much about them, because there is so much evidence for evolution. One alternative is Lamarck.
Second, if you are attempting to present a dual lemma tautology (which you must if you intend to present a non-false dichotomy), you would have to say that everything came about by natural or non-natural causes. I don't see a logical basis for assuming the non-natural cause is intelligent. It could be an omnipotent idiot.
August wrote:ID does not exclusively rely on falsification of the ToE to be proven, but since they are mutually exclusive, it does form a part of proving it by the impossibility of the contrary.
I would argue that if ID is a scientific theory, ID advocates should adopt a more scientific vocabulary and stop making statements about proving theories. Any trained scientist knows that theories can either be supported or disproved, but not proved. I've read a few archival posts from people who don't believe ID and the ToE are mutaully exclusive. Personally, I don't yet see that the theory is viable on its own, much less
better than some other theory.
August wrote:ncooty wrote:It seems to me that there are two options: either everything is intelligently designed or not everything is intelligently designed. So far, it seems that the shaky concept of irreducible complexity is the basis for determination of design. If I survive a haircut, I would suppose that would mean I was reducibly complex, and thus, not necessarily intelligently designed.
I'm not sure what your surviving a haircut has to do with IC. Care to elaborate?
Sure. Sorry about that. My hair is a part of my body. If I cut off some of my hair, I doubt an ID advocate would say that I no longer fulfilled my primary function (which, I would argue, is solely a perception). Thus, anyone who gets a haircut, sheds an eyelash, clips a fingernail, etc. and doesn't die (or lose the ability to procreate) must be reducibly complex, and thus, not intelligently designed. The same would hold for geckos (because they can lose their tails and survive), monkeys (because you can shave them or they can lose a tooth and they survive), flies, trees that lose their leaves... oh heck, anything.
Earlier you agreed that if a thing is intelligently designed, it is irreducibly complex. You also earlier wrote that if a thing is irreducibly complex, it is intelligently designed. If that's the case, then not only are all plants and animals not intelligently designed, cities aren't intelligently designed. Remember the Dembski example that cities are not irreducibly complex?
Cities are things.
If a thing is intelligently designed, it is irreducibly complex.
Cities are not irreducibly complex.
Therefore, cities are not intelligently designed. (modus tolens)
You can substitute apparently anything for "cities" and that seems to work. It works for plants and animals (including people).
August wrote:ncooty wrote: If people aren't intelligently designed, what is? Thus, I doubt irreducible complexity is the best basis for intelligent design.
There are many examples of ID quoted in literature. Why don't you define IC as you understand it, because somehow I'm not sure we have a common understanding of what it means.
The early part of this thread dealt in part with my logical/epistemological problems with the concept of irreducible complexity. You can add to that the concept of specified complexity. In a nutshell, irreducible complexity is a condition in which removal of any element from an object renders that object incapable of performing its primary function. Hair is an element of my body (as were my wisdom teeth, numerous fingernail clippings, etc.), yet I have maintained the ability to live and procreate despite having had many haircuts.
Specified complexity is similar in its unsubstantiated necessitation of specification of only one permutation as successful. There is no reason I've read to assume that this Universal permutation was specified at the beginning of time as the goal of the Universe. That's untestable and unsubstantiated (not to mention incredulously narcissistic).
August wrote:I doubt that we can get into the serious details here (my time constraints), but I can quote some of the more advanced studies if you think it would help. In addition to IC, there is also specified complexity and morphological novelty.
I thank you for all your help and comments. I found them to be insightful and helpful in thinking through the issue. I sincerely appreciate it. Whatever differences might remain between our opinions, I respect your opinions.
If you'd like to post other resources, my students and I might appreciate it. Thanks again for taking the time to respond.