CLIFFORD B. MCMANIS (Th.M., Ph.D.) is the teaching-pastor and an elder at Grace Bible Fellowship of Silicon Valley, in northern California and professor of Apologetics at The Cornerstone Seminary i...ver maisCLIFFORD B. MCMANIS (Th.M., Ph.D.) is the teaching-pastor and an elder at Grace Bible Fellowship of Silicon Valley, in northern California and professor of Apologetics at The Cornerstone Seminary in Vallejo, California. He also teaches Christian Education at The Masters College, Walnut Creek. Cliff and his wife, Debbie, along with their four children, reside in the San Francisco Bay Areaver menos