Greg L. Bahnsen was the scholar-in-residence at the Southern California Center for Christian Studies and an ordained minister iin the Orthodox Presbyterian Church. He received his Ph.D. in philosophy from the University of Southern California, specializing in the field of epistemology (theory of Knowledge). He also received M.Div. and Th.M. degrees from Westminster Theological Seminary, Philadelphia. Dr. Bahnsen was the author of numerous books and published articles and was a popular conference speaker. He was also a renowned public debater as evidenced in his interchanges with Muslims, Roman Catholics, Jews, and atheists. A complete list of his over 1,700 audio tapes, videos, articles, and books is available from the Covenant Media Foundation.