Science works by means of prediction. Once data is collected and evaluated, and a hypothesis formed, scientific method requires that certain predictions be made to act as tests of the overall theory. If the predictions work out, we can regard the hypothesis as proven. If not, we vow to do better next time. Take general relativity, for instance. (Full disclosure: this example is stolen in toto from Rush Limbaugh's program of February 2nd.) Einstein's theory was dismissed as lunatic by many classical physicists on its introduction in 1905. But he proposed a series of simple and straightforward tests, among them that starlight...