Ken Miller’s new book, Only a Theory: Evolution and the Battle for America’s Soul, has some frustrating aspects to it. For one, he gives the old argument that, if science allows for supernatural hypotheses, then science will stop:

A theistic science … will no longer be the science we have known. It will cease to explore, because it already knows the answers. (p. 198)

This argument has been given before (e.g. by Pennock) and the standard (and in my opinion correct) response has been given before (e.g. by Plantinga). I’m not faulting Miller for giving an argument that’s not new, but I am faulting him for seeming to show no awareness of the standard response. The standard response is that, while theistic scientists could choose to stop investigating the world, and be satisfied with the answer “God did it”, they need not. What theistic scientists can do is investigate the questions: “what did God do?” “What structure did God choose to give the world?” As long as scientists are willing to investigate those questions, then science can go on in pretty much the standard way. Allowing supernatural hypotheses won’t really change anything.

The worry, of course, is that scientists will be too willing to turn to the God answer when problems get tricky. But suppose some scientists do that — is it really so bad? Newton is undisputedly one of the greatest scientists ever to have lived, but when he came to the belief that the planetary orbits are unstable, he postulated that God occasionally intervened to keep the planets in their intended orbits. Did exploration stop a a result of Newton’s appeal to the supernatural? No; later investigators determined that the planetary orbits are more stable than Newton had thought. 

In sum: even though I think that supernatural hypotheses in science will ultimately be proved wrong, I don’t see how allowing them will lead to the end of science. Those scientists who are willing to allow for supernatural hypotheses can still search for naturalistic explanations for phenomena.