Friday, February 13, 2009
Mythbusters
In the category of excruciating irony, we have this title for a story by Pat Robertson's Christian Broadcasting Network: "On Darwin Day, Myths Parade as Fact." It may be ironic but it is certainly true because Pat's propagandists proceed to march out a whole phalanx of them delivered by, who else, that coterie of Discoveryless Institute talking ... um ... heads, Jonathan Wells, Stephen Meyer and John West.
About the only thing said in the piece that has any truth to it at all is that Darwin didn't present any evidence in the Origin for natural selection. The reason, of course, is that he didn't really need to. As the late Mike Majerus pointed out, natural selection is a logical result stemming from four observations, that had already been made as of Darwin's time, and three deductions from those observations:
Observation 1: Organisms produce far more offspring than give rise to mature individuals.
Observation 2: Yet, population sizes remain more or less constant.
Deduction 1: Therefore, there must be a high rate of mortality.
Observation 3: The individuals in a species show variation.
Deduction 2: Therefore, some variants will succeed better than others, and those with beneficial characteristics will be naturally selected to produce the next generation.
Observation 4: There is a hereditary resemblance between parents and offspring.
Deduction 3: Therefore, beneficial traits will be passed to future generations.
The observations were uncontroversial and the deductions follow from them in such a way that that virtually every creationist today will tell you that they accept "microevolution" by selection. Of course they then turn around and deny it again in the same breath, as in the concerted attack on Majerus' Peppered Moths work, but we're talking about creationists and can't expect even minimal consistency.
Also, since Darwin's time, we have had direct empiric evidence of natural selection at work, in the Peppered Moths and the studies of Darwin's finches in the Galapagos, among many others, so the implication that this is a grounds for rejecting evolution is, under the most charitable interpretation, disingenuous.
Of course, Darwin presented massive evidence for "macroevolution," more correctly called "common descent." So much so that, within a mere twenty years, virtually the entire scientific community had accepted the fact of evolution -- an amazing achievement -- though only a small minority of them had adopted Darwin's explanation of why and how it had come about. So, when Wells says:
"The myth is that Darwin provided all kinds of evidence for his theory in 'The Origin of Species.' Actually he didn't provide any at all or just about none at all," he said.
Another myth peddled by this trio is from "scientist" Stephen Meyer (he's a philosopher/historian):
He makes a scientific argument that, "What we know from experience, our uniform and repeated experience which is the basis of all scientific reasoning is that those forms of technology and information technology, and informational coding, invariably arise from one and only one type of cause," Meyer said.
Then they trot out the business about the "tree of life" that has already been hashed out at length.
There is one other thing that's said in the article that is true:
Darwin is more widely accepted than ever, especially among scientists. But there are a growing number of critics.
In effect, they are admitting that ID is not science and its promoters are not acting as scientists when they foist it on a more-or-less unsuspecting public.
They got that part right.
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