Jessica Leech

Williamson (1986) presents a troublesome example of the contingent a priori ; troublesome, because it does not involve indexicals, and hence cannot be defused via the usual two-dimensional strategies. Here I explore how the example works, via an examination of crucial belief-forming method M, partly in response to Hawthorne (2002) and the questions there raised for 'hyperreliable' belief-forming methods. I suggest that, when used to form a belief, M does its special work through creating a verifying state of affairs which guarantees the truth of the belief thus formed. This creative link can be said to account for the knowledge-conferring status of M. But it also provides us with a way to defuse the purported example of the contingent a priori . The knowledge at issue is only a priori in virtue of this creative link, an importantly different epistemic achievement from standard cases of a priori knowledge. One important moral to be drawn is that the a priori / a posteriori distinction does not appear to be slicing the epistemological beast at its joints.

Hossack (2007) defends what he calls the rationalist thesis: the thesis that necessity reduces to (or at least always coincides with) a priori knowledge. In this paper I discuss some features of Hossack’s rationalist account of necessity. In the first half, I attempt to fill in a missing link in the rationalist thesis, connecting the notions of primitiveness of facts and a priori modes of presentation. In the second half, I complain that the strategy of dissolving counterexamples is not enough, and that a general principle connecting necessity and a prioricity is needed. I suggest further kinds of counterexamples that might arise, but rather than demand a response to each counterexample, I suggest that they highlight the need for a general argument for the rationalist thesis.