  Graham and Maitzen (2007) note CORNEA's resemblance to some principles from elsewhere in epistemology. They seek to bring objections to those principles to bear on CORNEA. The principles are Nozick's “sensitivity” condition on knowledge and Dretske's similar account involving conclusive reasons. Nozick's sensitivity condition on knowledge is roughly that you know only if, were p false, you wouldn't believe p. Dretske's account is, approximately, you know p if you have a conclusive reason R for p, one such that were p not true you would not have R (and/or R would not be true, details vary). One of the main objections to those theories is that they violate almost any plausible closure principle on knowledge. The closure principle in question is, essentially, this one.