 One apparent problem with this suggestion is that the satisfaction of the antecedent does not seem to give the subject a reason to think the belief is true. The problem is clear if we assume, as acquaintance theorists generally do, that a belief can be justified for a subject only if the proposition believed is made probable by the subject’s evidence, or by that with which the subject is acquainted. The mere fact that I experience one of these shades fails to make probable, indeed, rules out, that I experience the other, and so gives me no justification for believing that I experience the other. Here’s a second attempt: