One of the longest-running debates among biblical scholars is over the existence of a hypothetical "lost gospel" called Q. If you compare the synoptic gospels — Mark, Matthew and Luke — there are similarities and differences that can't easily be explained. Was there an even earlier source about Jesus that these gospels were based on? And if so, who wrote it and why was it lost? Our guest today is Paul Foster, a colleague of Helen's at the University of Edinburgh. Paul is a passionate Q suppor...