 Some philosophers of science claim that in a wide variety of scientific cases we employ an “inference to the best explanation”  (IBE).[7]  The basic idea is that if one among a number of competing candidate explanations is overall superior to others in significant respects—enhanced likelihood, explanatory power and scope, causal adequacy, plausibility, evidential support, fit with already-accepted theories, predictiveness, fruitfulness, precision, unifying power, and the like—then we are warranted in (provisionally) accepting that candidate as the right explanation given the evidence in question (Lipton 1991, 58). Some advocates see design arguments as inferences to the best explanation, taking design explanations—whatever their weaknesses—as prima facie superior to chance, necessity, chance-driven evolution, or whatever.