Graham Priest is the most prominent contemporary champion of dialetheism, the view that some claims can be both true and false. He is known for his in-depth analyses of semantic paradoxes, and his many writings relate to paraconsistent and other non-classical logics. He has taught in Australia at the University of Melbourne since 2001 and has authored numerous books, most notably Beyond the Limits of Thought (Oxford University Press, 1995), An Introduction to Non-Classical Logic (Cambridge University Press, 2001), and In Contradiction: A Study of the Transconsistent (Oxford University Press, 2006), all of which are now in their second printings. His recent publications are Towards Non-Being: The Logic and Metaphysics of Intentionality (Oxford University Press, 2005) and Doubt Truth To Be a Liar (Oxford University Press, 2006). Over the course of his prominent career, he has published articles in nearly every major journal on philosophy and logic. Priest was a frequent collaborator with the late Richard Sylvan, a fellow proponent of dialetheism and paraconsistent logic. He has held visiting research positions at many universities, including the Australian National University, the Universities of Cambridge, New York, Pittsburgh, São Paulo, Kyoto, and the Soviet Academy of Sciences. He holds a Ph.D. in mathematics from the London School of Economics.

Photo: Ian North