  A very strong argument for mentalism has been proposed (Conee and Feldman 2001). The argument has two prongs: first, we are given a number of cases in which the best explanation for why one person has a higher degree of justification than another is that the first person has some specific mental state; and then second, it is argued that the mentalist theory can satisfactorily deal with problem cases and criticisms. One of the examples used in the first prong of the argument is this: