Abstract

Critical comments on Guido Melchior’s book, Knowing and Checking: An Epistemological Investigation (2019). In the second part of his book, Melchior aims to employ his sensitivity account of the epistemic concept of checking to explain well-known puzzle cases about knowing. My comments focus on Melchior’s explanation of knowledge-closure puzzles, as exemplified by Dretske’s zebra case. I raise three critical points about the explanation Melchior proposes for puzzles of this type.