Several influential thought experiments from Harman 1973 purport to show that unpossessed evidence can undermine knowledge. Recently, some epistemologists have appealed to these thought experiments in defense of a logically stronger thesis: unpossessed evidence can defeat justification. But these appeals fail to appreciate that Harman himself thought of his examples as Gettier cases, and so would have rejected this strengthening of his thesis. On the contrary, he would have held that while unpossessed evidence can undermine knowledge, it leaves justification intact. (...) In this paper I seek to undermine the viability of Harman’s position. If this is correct, contemporary epistemology faces a choice: either we reject that unpossessed evidence in Harman-style cases bears on knowledge _at all_, or else we must allow that it undermines knowledge _by defeating justification_. The former option must explain why Harman’s thought experiments elicit strong ‘no knowledge’ intuitions; the latter option embraces a minority view about the bearing of social expectations on the assessment of knowledge _and justification_ (= the doctrine of normative defeat). (shrink)

At first blush, Sosa’s performance-based approach to epistemic normativity would seem to put us in a position to illuminate important types of epistemic negligence – types whose epistemic significance will be denied by standard evidentialist theories. But while Sosa’s theory does indeed venture beyond standard evidentialism, it fails to provide an adequate account of epistemic negligence. The challenge arises in cases in which a subject is negligent in that she knowingly fails to perform inquiries which it was her responsibility to (...) perform, but where she had good (undefeated) reason to believe that had she done so her judgment would only have been reinforced, and where this higher-order judgment was apt. After arguing that these cases will pose problems for Sosa’s view, I diagnose the difficulty as one that will face any view that treats epistemic negligence either in exclusively performance-theoretic terms or exclusively evidential terms. (shrink)