The prevailing interpretation of Kant's First Critique in Anglo-American philosophy views his theory of a priori knowledge as basically a theory about the possibility of empirical knowledge (or experience), or the a priori conditions for that possibility (the representations of space and time and the categories). Instead, Robert Greenberg argues that Kant is more fundamentally concerned with the possibility of a priori knowledge--the very possibility of the possibility of empirical knowledge in the first place.

Greenberg advances four central theses: (1) the...