This is a Professor AC Grayling lecture recorded a few years back at Christ Church Grammar school, Perth, on the concepts of truth, realism and non-realism. Professor Grayling has lectured in philosophy at St Anne’s College, Oxford, before taking up a post in 1991 at Birkbeck, University of London, where in 1998 he became reader in philosophy, and in 2005 professor.

He resigned from Birkbeck in June 2011 to found and become the first master of New College of the Humanities, an independent undergraduate college in London. He is a Supernumerary Fellow of St Anne’s College, Oxford. He writes the Thinking Read column for the Barnes and Noble Review in New York, is the Editor of Online Review London, and a Contributing Editor of Prospect magazine.