Quassim Cassam is Professor of Philosophy at the University of Warwick. He was previously Knightbridge Professor of Philosophy at Cambridge, Professor of Philosophy at University College London, and also taught for many years at Oxford University. He is the author of Self and World (1997) and The Possibility of Knowledge (2007), both published by Oxford University Press.
John Campbell is Slusser Professor of Philosophy at the University of California, Berkeley. Before that he was Wilde Professor of Philosophy at the University of Oxford. He is the author of Past, Space and Self (MIT, 1994) and Reference and Consciousness (OUP, 2002).