Abstract

In this chapter, I examine a priori knowledge from the perspective of my account of warrant. According to the epistemological tradition, what is known a priori is known, somehow, prior to or independently of experience; in the first section of this chapter, I attempt to clarify this claim and describe some of the general features of a priori belief and knowledge. In the second section I argue, among other things, that a priori warrant is fallible and comes in degrees. I go on to consider an objection to the existence of a priori knowledge based on what has been called the causal requirement. I argue that there is no plausible form of the causal requirement that constitutes a good objection to the existence of a priori knowledge; along the way, I offer an argument for the conclusion that propositions cannot be concrete objects of any sort, and point out that it is quite possible to think of abstract objects as capable of standing in causal relations with us.