William Fish is a professor of philosophy at Massey University. He is the author of Perception, Hallucination, and Illusion (Oxford University Press, 2009) and Philosophy of Perception: A Contemporary Introduction (Routledge, 2010), co-author of Internal Security and Statebuilding: Aligning Agencies and Functions (Routledge, 2015), and editor of Perception: Critical Concepts in Philosophy (Routledge, 2016). He has also published a range of articles, encyclopaedia entries and book chapters. In addition to his involvement in teaching critical thinking, Bill also teaches courses on philosophy of mind and epistemology at both undergraduate and postgraduate levels.