INTELLIGENT DESIGN REDUX.
Volokh writes (albeit in the spirit of devil's advocacy):
But whatever might be wrong about teaching intelligent design, it's not that intelligent design is wrong.
Not so.
"Intelligent design" isn't science in the slightest. As
Scott and Sager note, "Whether evolution occurred or not is not a debated question in mainstream science." (The linked page gives a good explication of why Philip Johnson's legal-style analysis falls short when applied to scientific study.) As
Gilchrist writes:
A theory represents a collection of explanations, hypotheses, tests, and applications, including anomalies and failures (Kuhn 1962). Not all aspects of any theory are directly testable. For example, any theory explaining organismal diversity cannot be directly tested, since the plants, animals and microbes that make up the living world are the result of a historical process not readily replicated in the laboratory. However, evolutionary theory (and presumably, intelligent design theory) contains corollaries that make non-obvious predictions about patterns within the existing biota that can be tested.
If intelligent design theory is a viable alternative to evolutionary theory, then scientists must be using it to devise tests and to interpret patterns in the data they collect. What sense would there be in presenting an idea as a scientific theory if the idea were not actually used by working scientists? The importance of a scientific theory is not related to its popularity with the general public, but to its utility in directing research and explaining observations within a particular field of study (Kuhn 1962). For example, millions of people read their horoscopes each day, but astrology plays no role in directing research by astronomers or psychologists. Astrology, therefore, is not discussed in science textbooks except in a historical context. Because professional scientists must publish their work to retain their jobs and to obtain funding, the relative status of intelligent design theory and evolutionary theory can be assessed by comparing their frequency of usage in the professional scientific literature.
Guess how many peer-reviewed published papers exist using intelligent design theory to explain biological diversity. It's a round number. A very round number. Yep,
zero.
Davis and Kenyon have baptized their concept of external design of living organisms as "intelligent design theory", but where is the research using this theory? The first edition of their book appeared in 1989; surely by 1997 there should be some evidence of intelligent design theory in the scientific literature if it is a bona fide piece of science.
Another example: around the world, oil and gas exploration companies make decisions worth billions of dollars based on scientific understandings of the history of the earth and interpretations of the geologic and fossil records of core samples. Is this a massive market failure, whereby an "intelligent-design" "scientist" can open up his or her own oil-and-gas exploration business and trump the competition by using the supposedly superior science? Or has the market correctly rejected young-earth creationism and the various pseudo-scientific attempts to resuscitate creationism?
In contrast, Darwin never envisioned the twentieth- and twenty-first century science of molecular biology, but advances in genome reading have produced results utterly consistent with the theories and predictions made by those studying the paleontological record.
To date, there is
still no scientific support for intelligent design: this is why intelligent design supporters, instead of making scientific arguments, refer to tilted Zogby polls about what the public purportedly wants taught (as seen in the Washington Post article I link to below). Fortunately, we don't rely on the popular vote (yet) for decisions such as the optimal way to conduct open-heart surgery. The "intelligent design" vs. evolution debate is only a debate on the field of politics. In the world of science, it's a mismatch of
Los Angeles Lakers vs.
Beverly Hills Montessori School proportions.
Volokh also writes "Evolution has not been proven in any common sense of the term," but this is misleading at best. By that standard, astrology should be taught alongside astronomy and the theory of gravity, because conventional astronomy has not been "proven." Science deals with testable hypotheses, rather than Euclidean or Boolean proofs.
Mark Isaak writes:
Proof, in the mathematical sense, is possible only if you have the luxury of defining the universe you're operating in. In the real world, we must deal with levels of certainty based on observed evidence. The more and better evidence we have for something, the more certainty we assign to it; when there is enough evidence, we label the something a fact, even though it still isn't 100% certain.
(And, in that sense, my "two plus two equals four" language in the post below was perhaps slightly hyperbolic. The underlying point, though, was right: this is a one-sided debate where one side is absolutely correct and the other side doesn't know what it's talking about, and modern journalism's demand for "balance" hides that.) Evolutionary theory (and even
speciation) has been demonstrated in real life. Intelligent design hasn't.
Volokh: "Intelligent design is consistent with the evidence, too." Not so: the late Stephen Jay Gould's writings on
the Panda's Thumb is a delightful refutation. Others have compiled
numerous other examples (albeit of varying quality) of "jury-rigged" design. (Ms. Postrel's
Reason magazine ran an interesting article a few years back speculating why so many otherwise intelligent neo-conservatives have flocked to intelligent-design pseudoscience.
Eugenie Scott notes that part of the incoherence of intelligent design theory comes from the fact that it's a political coalition trying to create an umbrella for creationists with contradictory theories rather than any sort of science.)
(Self-important and irrelevant side note: I get a link or two from Volokh a week, have broken bread (or, at least, noodle soup) with him, played poker with him, and have met at least two other
Volokh Conspiracy bloggers. What's a fellow got to do to get a permalink?)