For over a decade now epistemologists have been thinking about the peer disagreement problem of whether a person is reasonable in not lowering her confidence in her belief P when she comes to accept that she has an epistemic peer on P who disbelieves P. However, epistemologists have overlooked a key realistic way how epistemic peers can, or even have to, differ epistemically—a way that reveals the inadequacy of both conformist and non-conformist views on peer disagreement by uncovering how the (...) causes of peer disagreement bear on the debate’s core philosophical issue. Part of our argument for this thesis will involve giving a thorough yet entirely informal presentation of mathematical theorems in economics by Robert Aumann :1236–1239,1976) and Polemarchakis and Geneakoplos which represent a formally precise description of how two rational agents must deal with disagreement under certain epistemically interesting circumstances. (shrink)

Far from considering the phenomenon of disagreement across the board, the peer debate in epistemology solely focuses on cases of disagreements that are at least assumed to be genuine. What counts as a genuine disagreement is most of the times kept on the level of a pre-theoretical intuition according to which the peers disagree insofar as they hold incompatible doxastic attitudes with respect to a proposition P (King, 2012). Yet, the pre-theoretical intuition yields the wrong verdict when the bone of (...) contention is a proposition whose truth is relativized. In order to avoid these counter-intuitive results, the peer debate needs to replace the pre-theoretical intuition of genuine disagreement with a full-fledged account of it. In this essay I firstly put forth a possible candidate for the role coming from an ongoing discussion in philosophy of language. Then, I assess how well such an account fares in both an outright and a credal model of belief. (shrink)

We show a somewhat surprising result concerning the relationship between the Principal Principle and its allegedly generalized form. Then, we formulate a few desiderata concerning chance-credence norms and argue that none of the norms widely discussed in the literature satisfies all of them. We suggest that the New Principle comes out as the best contender.