For most of their respective existences, reliabilism and evidentialism (that is, process reliabilism and mentalist evidentialism) have been rivals. They are generally viewed as incompatible, even antithetical, theories of justification. 1 But a few people are beginning to re-think this notion. Perhaps an ideal theory would be a hybrid of the two, combining the best elements of each theory. Juan Comesana (forthcoming) takes this point of view and constructs a position called "Evidentialist Reliabilism." He tries to show how each theory can profit by borrowing elements from the other. Comesana concentrates on reliabilism's problems and how it might be improved by infusions from evidentialism. This paper follows a similar tack. My emphasis, however, is the reverse of Comesana's. I highlight problems for evidentialism and show how it could benefit by incorporating reliabilist themes. I am not sanguine that evidentialists will see it my way.They might even view my proposals as an insidious attempt to convert evidentialists to reliabilism. Well, I won't debate the best way to formulate this paper's recipe. At any rate, it began with the idea (which anteceded my reading of Comesana) of creating a synthesis of reliabilism and evidentialism. It retains significant strands of that idea, although the synthesis theme does not pervade the entire paper.What is mentalist evidentialism? Its original formulation was succinct:[EJ] Doxastic attitude D toward proposition p is epistemically justified for S at t if and only if having D toward p fits the evidence S has at t. (Feldman & Conee, 1985.I begin by raising worries about the notions of evidence and fittingness that are crucial to evidentialism as formulated by [EJ]. To help with many of the problems raised, I recommend supplements borrowed from reliabilism. As we proceed I shall also present reasons why reliabilism might be improved by doses of evidentialism.
1. The Concept of Evidence in EvidentialismA theory of justification that calls itself "evidentialism" and makes evidence possession its focus can reasonably be asked to explain which concept of evidence it means to invoke. If the only viable concept of evidence available to it introduces elements from a "foreign" approach such as reliabilism, this should provide some motivation toward a synthesis or unification with that approach. This is the situation