Authorship is an area of longstanding and current research and debate, with different works posing different problems for identification. While the various works have traditional ascriptions of authorship, these ascriptions are in some cases defended by scholars, and in other cases disputed or rejected.[42] According to many (if not most) critical scholars, none of the authors of the Gospels were eyewitnesses or even explicitly claimed to be eyewitnesses.[43][44][45] Bart Ehrman of the University of North Carolina has argued for a scholarly consensus that many New Testament books were not written by the individuals whose names are attached.[45][46][better source needed] He further argues that the Gospels were originally anonymous, and names were not ascribed to them until around 185 AD.[47][48] Other scholars concur.[49][50][51] It is the perspective of some writers that none were written in Palestine.[52][need quotation to verify]