Philosophical logic refers to those areas of philosophy in which recognized methods of logic have traditionally been used to solve or advance the discussion of philosophical problems.[1] Among these, Sybil Wolfram highlights the study of argument, meaning, and truth,[2] while Colin McGinn presents identity, existence, predication, necessity and truth as the main topics of his book on the subject.[3]
Philosophical logic also addresses extensions and alternatives to traditional, "classical" logic known as "non-classical" logics. These receive more attention in texts such as John P. Burgess's Philosophical Logic,[4] the Blackwell Companion to Philosophical Logic,[5] or the multi-volume Handbook of Philosophical Logic[6] edited by Dov M. Gabbay and Franz Guenthner.