Douglas Groothuis (PhD, University of Oregon) is professor of philosophy at Denver Seminary in Denver, Colorado, where he heads the apologetics and ethics masters degree program. His articles have been published in journals such as Religious Studies, Philosophia Christi, Themelios, Christian Scholar's Review, Inquiry, and Journal of the Evangelical Theological Society. He has written numerous books, including Christian Apologetics, Philosophy in Seven Sentences, and Truth Decay.

Andrew I. Shepardson (PhD, University of Toronto) leads the B.A. and M.A. programs in Applied Apologetics at Colorado Christian University and is co-pastor of Hope Denver Church in Denver, Colorado. His work has been published in Philosophia Christi, Quadrum,The Denver Journal, Orthodoxy in Dialogue, and the Toronto Journal of Theology. He is the author of Who’s Afraid of the Unmoved Mover?: Postmodernism and Natural Theology.