After moving to England in his teens, he spent three years at the University of Sussex, but said that although he applauded their intention to educate generalists, he wished to be a scholar, so in addition to his BA from Sussex, he also completed one in philosophy as a University of London external student. He went on to obtain an MA from Sussex, then attended Magdalen College, Oxford, where he was taught by P. F. Strawson and A. J. Ayer, obtaining his doctorate in 1981 for a thesis on "Epistemological Scepticism and Transcendental Arguments". A part of that thesis is published as "The Refutation of Scepticism" (1985) and its themes are further developed in "Scepticism and the Possibility of Knowledge" (2008).