Graham Oppy is Professor of Philosophy at Monash University, where he has recently been Head of the School of Philosophy and Bioethics, and Associate Dean Research in the Faculty of Arts. His publications in philosophy of religion include Ontological Arguments and Belief in God (1996), Philosophical Perspectives on Infinity (2006), and Arguing about Gods (2006) and numerous journal articles. Michael Scott is lecturer in Philosophy at the University of Manchester and editor of Ars Disputandi , an online journal in philosophy of religion. He has written several papers in philosophy of religion and perception and co-authored Realism and Religion (2007) with Andrew Moore.