nikolayevich wrote:Jose wrote:Ian Parker wrote:The question is about the ability of this to converge to a complex solution algorithmically. GAs provide a model. GAs provide a model for what can ge expected.
GAs illustrate that mutation + selection is a way to explore the available space. GAs are modeled on evolution. However, they are irrelevant to the question of whether evolution can produce complex solutions.
Dawkins and others do differ somewhat on this point however. At least, if it is not often said, it is believed that there is relevance to finally answering that question for detractors. I believe the point is valid if only it seeks to foster discussion about what is often claimed of GAs and the "hope" if we can call it that, which scientists see in GAs validating aspects of a complex problem.
For the most part--at least in my understanding--GA's are used because they work to solve problems. People have raised them here only because they are based on random mutation and selection, and hence provide a kind of "proof of principle." What the proof of principle shows is that "stuff can happen."
I think I would argue that the critical thing about evolution, which seems to be denied in many quarters, is that "stuff can happen" there, too.
With respect to ID, the question would be: suppose "stuff happens," entirely by the rules of the Theory of Evolution (i.e. the demonstrated mechanism). What would the ID folks say of the outcome?
nikolayevich wrote:Jose wrote:As has been mentioned before, all of the grains of sand on a beach are one complex solution to the question of where the grains should be. The probability of that particular arrangement occurring is vanishingly low. Therefore, we "prove" that wind and waves and gravity are unable to produce the pattern we see for sand on a beach. This is the exact logic of ID.
This not even sort of the logic of ID. ID does not predict that all low probability events are so realized by a designer or intelligent agent. ID does not base itself solely on probability, but also on, as the name suggests, design, or in more scientific terms, "high specificity". Thus, an automobile is said to conform to at least these two requirements of ID. The sand in its present form, no.
Ah, but the Theory of Evolution, and the mechanism that has been demonstrated, contains no "high specificity." It is like the sand on the beach. Stuff happens. Once it has happened, well, we can see it.
The sand on the beach is, to use ID terms, of extremely high specificity. Each grain is in
exactly one location. It couldn't be higher specificity than that.
It's the same with DNA. Each base is in exactly one relationship to the other bases. The only difference is that one of these (presumably, not the sand) contains the information for building a human. The ID premise is that this is because it's designed, and we are special.
But how do ID folks determine whether information has high specificity or not? The stuff I've read always comes out the same: calculate the probability of that information assembling at random. This is why the sand example is a perfect parallel. It, too, has high specificity when we use the same algorithm for detecting it.
nikolayevich wrote:Jose wrote:Nonetheless, our particular beliefs are irrelevant. What matters is the data. We know how evolution works.
Who is the "we"? I say, "we" doubt the ability of chance mutations and selection to account for the diversity of life on this planet. "We" here can't be used universally as in, everyone just "knows". Many who have the skills to understand disbelieve it.
It is true that many who have the skills do not believe it. It is true that many doubt whether microevolution can achieve what the data say it has. That's fine. Let's discuss the data on its merit.
The ID movement is an effort to derail this discussion, and steer it in a creationist direction. The Discovery Institute has, after all, come out and said that their goal in pushing ID is to have design "theory" replace scientific thought, and to bring us back to reliance on Christian belief.
They can't do that by discussing the data supporting evolution on its merits.
nikolayevich wrote:Jose wrote:I would think it would be rather embarrassing to say "I don't understand how the bacterial flagellum arose, so I'll just give up and say god did it."
It is not incompetence or lethargy by which everyone doubts ToE. There are legitimate doubts on both sides of the debate and just because we figure we have the right answer, certainly doesn't mean that others are therefore not thinking or trying.
You are absolutely right. It is not incompetence or lethargy that results in the ID proponents saying this. It's simple doubt. It really is saying "I just don't see how it could have happened." The doubt is valid. In fact, given the way that we teach evolution, I'd be surprised
not to find such doubt.
BUT, the conclusion is not warranted. If I have doubt, I should ask how in the world those beanbrains came up with this evolution stuff. I'll try to figure out their reasoning, and look at the data, and see if their interpretations are warranted. I won't say "eh--they're wrong; it must be creation." Unfortunately, when I do look at the data, I find that they've put together a pretty darned reasonable explanation. That it does not require a god isn't their fault. It's just what the data indicate.
When I say "we know how evolution works," I
do not mean that we have 100% of the dots in the Great Connect The Dots Game of Life. What I mean is that the genetic mechanism is beyond doubt. Even the ID folks claim that evolution happens, after all. Even the YECs agree that mutation and selection occur.
This is the mechanism. The question that exists, and about which you and others are skeptical, is whether this simple mechanism can account for the diversity of life.
There are two important things that one must do to evaluate this issue on its own merit. The first is to suspend disbelief (not skepticism, just disbelief). The second is to get the data and evaluate it. Enough is known about embryonic development, and about limb development in particular, to know that the lobe-finned fish to tetrapod transition is entirely reasonable. The maniraptor to bird transition is equally reasonable. These are a couple of the most resisted evolutionary transitions, but in the last decade, so much has been learned about the genes involved, and so many new transitional fossils have been found that there is very little reason to doubt it. The only reason, it seems, is disbelief. It is from disbelief that the ID movement comes.
nikolayevich wrote:Jose wrote:Well....if our economic vitality depends on science, and Life Science in particular, we gotta understand science. We can't just memorize things; the employers don't want that. They need people who can think. In the Life Sciences, that also means understanding evolution.
I agree with this statement, providing evolutionary criticism is welcomed and encouraged, as it is with engineering, or economics. If we are to teach students how to _understand_ science, they will have to be able to generate challenges to theories and even maxims, firmly held or otherwise, as they are equipped to do so. I would add that we need to teach philosophy of science and critical thinking. Not to bias students. On the contrary, to recognize their biases and that of their instructors. One of the most valuable life lessons we can all learn is that we are all biased. None is completely objective. With that understanding we can begin to approach science in new ways and check each other along the way.
I agree fully. The trick is to generate
valid challenges to the extant theories. The so-called
"critical analysis of evolution" lesson that has been foisted onto Ohio students is a case in point. While some parts of it are fine (critical anallysis is to be praised, after all), it promulgates misconceptions and falsehoods in the guise of "explaining" how to answer their questions. If these guys want to challenge evolution, they should do so with legitimate challenges. They shouldn't make up goofy stories and present them as if they are challenges. That just wastes time that could otherwise be spent on learning those things you've listed--critical thinking, philosophy of science, recognition of bias, and actual understanding.
No one is saying that evolutionary theory should not be challenged, or that it is somehow "sacred" and off-limits. Rather, what is being said is that the challenges must be valid. Almost invariably, the challengers, whether ID, YEC, Scientologists, Moonies, or whatever, recycle the same arguments that
have been addressed before. In science, once an argument has been ruled out, we stop using it and go on. The YEC/ID challengers don't do that. They use the same things over and over, even after they've been discredited. It's like they don't listen to the discussion (or, more likey, don't care because they believe they are on a crusade that is so important that any tactics are fair). But, that's what the other threads here are designed to discuss.
ID does seem to have invented a couple of new lines of reasoning. The "incredulity" logic isn't new, but "irreducible complexity" and "complex specified information" are. Both of these latter ideas depend, for their "proof" on assumptions that
are not part of evolutionary theory or mechanism. Thus, all they disprove are those assumptions.