Greg L. Bahnsen, (1948-1995), was an ordained minister in the Orthodox Presbyterian Church and a full time Scholar in Residence for the Southern California Center for Christian Studies. He received his Ph.D. in philosophy from the University of Southern California, specializing in the theory of knowledge. He previously received the B.A. (magna cum laude, philosophy) from Westmont College, and then simultaneously earned the M.Div. and Th.M. degrees from Westminster Theological Seminary. Dr. Bahnsen lectured to a broad range of evangelical Christian groups at many colleges and conferences. He was an experienced apologist and debater, a clear and cogent teacher of the Christian worldview who was devoted to training believers in understanding and applying the Christian faith to every area of life. He published numerous scholarly articles, a number of well-known books, and has over 1,500 recorded lectures and sermons.