J. A. Cover is professor of philosophy at Purdue University. Leaving a research post after completing a B.S. in biochemistry and biophysics at the University of California, Davis, he took a B.A. in philosophy at Syracuse University, where he later received his M.A. and Ph.D. Published widely in journals and books on issues in early modern philosophy, metaphysics, and philosophy of science, he is coeditor of Central Themes in Early Modern Philosophy (Hackett, 1990), coauthor of Theories of Knowledge and Reality, Second Edition (McGraw-Hill, 1994), coauthor of Leibniz on Substance and Individuation (Cambridge, 1999), and coeditor of Leibniz: Nature and Freedom (Oxford, 2005). Martin Curd is associate professor of philosophy at Purdue University. He has a B.A. in natural sciences from Cambridge University and a Ph.D. in history and philosophy of science from the University of Pittsburgh. Working mainly in philosophy of science and epistemology, he is coeditor of The Routledge Companion to Philosophy of Science (2008). Christopher Pincock is associate professor of philosophy at The Ohio State University. He received his Ph.D. in philosophy from the University of California, Berkeley in 2002. Pincock has published articles in the philosophy of science, the philosophy of mathematics and the history of analytic philosophy. His book Mathematics and Scientific Representation (Oxford) was published in 2012.