Quassim Cassam is Professor of Philosophy at the University of Warwick. He was previously Knightbridge Professor of Philosophy at Cambridge, and has also taught at Oxford and UCL. He is the author of Self and World (OUP, 1997), The Possibility of Knowledge (OUP, 2007) and, with John Campbell, Berkeley's Puzzle: What Does Experience Teach Us? (OUP, 2014).