This collection of newly commissioned essays edited by nyu philosophers paul boghossian and christopher peacocke resumes the current surge of interest in the proper explication of the notion of a priori the authors discuss the relations of the a priori to the notions of definition meaning justification and ontology explore how the concept . New essays on the a priori australasian journal of philosophy 2002 graham oppy. New essays on the a priori july 2002 australasian journal of philosophy 803 doi 101080 713659458. New essays on the a priori a priori knowledge and justification have long played a prominent part in epistemology and the theory of meaning this text offers a variety of approaches to the a priori examining its role in different areas of philosophical enquiry