Philosophy and Phenomenological Research

Volume 71, Issue 2, September 2005

Juan Comesaña
Pages 367-383

Justified vs. Warranted Perceptual Belief
Resisting Disjunctivism

In this paper I argue that McDowell’s brand of disjunctivism about perceptual knowledge is ill-motivated. First, I present a reconstruction of one main motivation for disjunctivism, in the form of an argument that theories that posit a “highest common factor” between veridical and non-veridical experiences must be wrong. Then I show that the argument owes its plausibility to a failure to distinguish between justification and warrant (where “warrant” is understood as whatever has to be added to true belief to yield knowledge).