  It is clear that this argument is not decisive, though neither is it claimed to be. The number of cases it examines is very small, of course, but that is not the principal limitation. The important point is that enhancing one's justification, as in Bob's situation, is compatible with the initial justifiers prior to enhancement being elements other than the mental states of the individuals involved. The example of Ray and Bob, and the other examples Conee and Feldman give in which justification is enhanced, all assume that some degree of justification is already on hand before the enhancement event. Nothing in their examples gives us reason to suppose that initial justification is supplied by mental states. So, while it may be granted that their argument provides some good evidence for mentalism, it does not go far enough by itself.