 Starting out from this line of thought, a number of philosophers have gone on to claim that in order to be justified in asserting that there are evils in the world that establish that it is unlikely that God exists, one would first have to examine all of the traditional arguments for the existence of God, and show that none of them is sound. Alvin Plantinga, for example, says that in order for the atheologian to show that the existence of God is improbable relative to one’s total evidence, “he would be obliged to consider all the sorts of reasons natural theologians have invoked in favor of theistic belief—the traditional cosmological, teleological and ontological arguments, for example.” (1979, 3) And in a similar vein, Bruce Reichenbach remarks: