Abstract

Epistemological disjunctivism argues that one can have perceptual knowledge that p in virtue of being in possession of factive and reflectively accessible rational support, e.g., one’s ‘seeing that p’. A well-known challenge to this view is the so-called basis problem of epistemological disjunctivism, which argues that one’s ‘seeing that p’ cannot constitute the rational support for one’s knowledge that p, as ‘seeing that p’ is just a way of ‘knowing that p’. The basis problem is taken to be based on the entailment thesis, viz, ‘seeing that p’ entails ‘knowing that p’. Mainstream solutions to the basis problem take an approach rejecting the entailment thesis. This paper purports to reveal a common defect of those extant solutions. That is, they all fail to address the basis problem in the central domain of discussion of epistemological disjunctivism, i.e., what Pritchard refers to as ‘paradigmatic cases’. Moreover, even if they succeed in rejecting the entailment thesis in paradigmatic cases, they would also backfire on epistemological disjunctivism.