One of the lessons we ought to have learned from the history of philosophy and science is that it is rarely, if ever, useful in dealing with challenges from a new movement or in distinguishing one’s position from a different school of thought, to “draw a line in the sand” and claim that everything on this side is legitimate and that everything on that side is not, and can therefore be dismissed without serious consideration or discussion. On some analyses, Plato (...) sought to dismiss all of natural science in this way, by claiming that since it dealt with change it can yield at best belief, not knowledge. The logical positivists, building on the work of Hume, tried to use the analytic/synthetic distinction and various forms of verificationism to dismiss as nonsense everything but science, logic, mathematics, and the philosophy of science. Neither of these moves succeeded in banishing what was placed on that side of the line to intellectual never-never land. More recently, critics of creationism have dismissed the views they are attacking as “not science at all” and therefore of neither concern nor interest to the scientific communities. These maneuvers tend to be unsuccessful not just because they rely on distinctions which cannot, in the end, be sustained—or can be drawn and maintained only after all the hard work which they are frequently claimed to make unnecessary has been done—but because they refuse to deal with the specific evidence and arguments advanced by the challengers, bad as those might be. (shrink)