Wil Waluchow is a Professor in McMaster's Department of Philosophy, the Senator William McMaster Chair in Constitutional Studies, and an Adjunct Member of the Graduate Faculty of Osgoode Hall Law School, Toronto. His BA and MA in philosophy are from the University of Western Ontario (Huron University College) and his DPhil in the philosophy of law is from Oxford University, where he studied under the supervision of H.L.A. Hart. His current research interests are in general jurisprudence and the philosophy of constitutional law. He is the author of numerous books, including Inclusive Legal Positivism (OUP, 1994) and A Common Law Theory of Judicial Review: The Living Tree (CUP, 2007).; Stefan Sciaraffa is Assistant Professor in McMaster's Department of Philosophy. He specializes in the philosophy of law and social, moral and political philosophy. He received a J.D. from the University of Texas and a Ph.D. in philosophy from the University of Arizona. He practiced law as an associate with the commercial litigation section of Akin, Gump, Strauss, Hauer & Feld, LLP.