  A somewhat weaker form of mentalism would maintain only that for each justified belief a person has, some essential justifiers for that belief are mental states of that person, but that other essential justifiers for that belief need not be mental states. Such an account would not be a wholly internalist account, of course, in either the mentalist sense or the accessibility sense, for these further essential justifiers need be neither mental states nor particularly accessible to reflective awareness. The account would rather be one that contained both some internalist elements (some essential justifiers are mental states) and some externalist elements (some essential justifiers are not mental states). The result would count, therefore, as a mixed theory, though the theory might be otherwise perfectly viable as a general account of justified belief.