Here's a hypothesis I'm toying with that's inspired by recent work in the pragmatic encroachment literature and the epistemology of disagreement literature (although it employs the notions from both bodies of literature in a bit of an unorthodox way):
Suppose that A and B are true epistemic peers, and that they are aware of the same body of evidence E for some religious proposition P. E pushes A to accept P; E fails to push B to accept P; A and B bring up the topic of P, and then discuss E. After patient and careful discussion of E, A and B still disagree about whether E is sufficient to put one in a position to know (or be justified in believing) that P is true. What's going on here? Are they both epistemically in the right, or has the awareness of their disagreement deflated their evidence at least a bit, (in which case they should each move at least a bit closer toward the other in terms their propositional attitudes)?
Here's my tentative hypothesis: It depends. For whether one knows (or is justified in believing) something depends, at least in part, on the practical stakes involved in getting it right: higher practical stakes entail higher standards for knowledge (or justified belief); lower practical stakes entail lower standards for knowledge (or justified belief). Therefore, if the practical stakes for (say) A are lower than they are for B with respect to P, then it might be that A is entitled to say that she knows (or is justified in believing) that P is true on the basis of E, and B is entitled to say that she doesn't know (or is justified in believing) that P is true on the basis of E. In other words, there might be cases where both are right to hold their current propositional attitudes, even after their discussion of the evidence. On the other hand, if it turns out that the practical stakes for A and B are the same with respect to P, then both A and B ought to move at least a bit closer toward the other in terms their propositional attitudes.
In any case, that's the basic idea. Thoughts?
Review of Draper and Schellenberg (eds.), <I>Renewing Philosophy of Religion: Exploratory Essays</I>
Adam Green reviews the book for NDPR.
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