How must our knowledge be systematically organized in order to justify our beliefs? There are two options--the solid securing of the ancient foundationalist pyramid or the risky adventure of the new coherentist raft. For the foundationalist like Descartes each piece of knowledge can be stacked to build a pyramid. Not so, argues BonJour. What looks like a pyramid is in fact a dead end, a blind alley. Better by far to choose the raft.

Here BonJour sets out the most extensive antifoundationalist argument yet developed. The first part of the book offers a systematic exposition of...