Paul Copan is Pledger Family Chair of Philosophy and Ethics at Palm Beach Atlantic University in West Palm Beach, Florida. He has authored and edited a variety of books including Loving Wisdom: Christian Philosophy of Religion (2007), The Rationality of Theism (with Paul Moser, 2003), and Creation out of Nothing (with William Lane Craig, 2004).

Philip L. Quinn is John A. O'Brien Professor of Philosophy at the University of Notre Dame, Indiana, and was previously William Herbert Perry Faunce Professor of Philosophy at Brown University, Rhode Island. He is author of Divine Commands and Moral Requirements (1978), and of numerous articles in philosophy of religion, philosophy of science, theoretical physics, religious ethics, metaphysics, epistemology, value theory, political philosophy, and philosophy and literature. He has served as editor of the journal Faith and Philosophy (1990-5); as President of the Central Division of the American Philosophical Association (1994-5); and as Chair of the National Board of Officers of the American Philosophical Association (1995-9).

Charles Taliaferro is Associate Professor of Philosophy at St Olaf College, Minnesota. He was Visiting Scholar at Oriel College, Oxford, and has taught at Brown University, the University of Massachusetts, and the University of Notre Dame, Indiana. He is the author of Consciousness and the Mind of God (1994) and Contemporary Philosophy of Religion (Blackwell Publishers, 1997), and numerous papers in philosophy of religion, metaphysics, and ethics.

His publications include Faith and Philosophy (1964), The Ontological Argument (1965), God and Other Minds (1967), The Nature of Necessity (1974), God, Freedom and Evil (1974), Does God Have a Nature? (1980), Faith and Rationality (1983), The Twin Pillars of Christian Scholarship (1990), Warrant: The Current Debate (1993), Warrant and the Proper Function (1993), The Analytic Theist: An Alvin Plantinga Reader (1998), Warranted Christian Belief (2000) and Essays in the Metaphysics of Modality (2003).

Alvin Plantinga was born 15 November 1932 in Ann Arbor, Michigan. His father, Cornelius, was then a philosophy graduate student at the University of Michigan. When Cornelius graduated with a Ph.D. from Duke University, the family lived on a relatively low income until he secured a teaching job in Huron, Michigan, in 1941.

John Greco is Associate Professor of Philosophy at Fordham University, where he has taught in the Philosophy Department since receiving his Ph.D. from Brown University in 1989. He is the author of Putting Skeptics in Their Place: The Nature of Skeptical Arguments and Their Role in Philosophical Inquiry (New York: Cambridge University Press, 2000) and co-editor with Ernest Sosa ofThe Blackwell Guide to Epistemology (Oxford: Blackwell Publishers, 1999). He has published essays in epistemology, moral theory, and philosophy of religion in journals such as American Philosophical Quarterly, American Catholic Philosophical Quarterly, Canadian Journal of Philosophy, Metaphilosophy, Philosophical Perspectives and Philosophy and Phenomenological Research. He is also the author of "Virtue Epistemology" in the Stanford Encyclopedia of Philosophy, and "Virtues in Epistemology" in Oxford Handbook of Epistemology.