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 editors paul boghossian christopher peacocke publisher clarendon press 2000 isbn 0191529079 9780191529078 length 490 pages subjects. The topics of a priori knowledge and a priori justification have long played a prominent part in