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Three Questions about the A Priori: Its Significance, Sources, and Extent
Chapter 1 first presents a particular way of understanding the problematic character of a priori justification. It then develops the three main questions around which the book is structured. The first question concerns the significance of a priori justification: the chapter explains the difficulties in articulating the crucial notion of independence from experience. The second question concerns the sources of a priori justification: the chapter discusses the prospects for intuitions and understanding to play that role. The third question concerns the extent of a priori justification: the chapter examines a couple of contested cases (introspection and testimony). The chapter also explains the aims and origin of the book, and it closes with an exposition of the essential contents of each chapter.