Christianity Today kindly posted Chris Reese’s interview of me regarding my new book, Christobiography, here. (The following is a sample of my answer to his first question)
Given what we know about disciples in antiquity, and given the relatively brief span of time between Jesus’s public ministry and the first written accounts that we know about, historians should expect genuine reports of events and teachings of Jesus to dominate in the gospels.
As a Christian, I personally affirm more than that, but I believe that even on purely historical grounds, we should expect most accounts in the gospels to reflect genuine events in Jesus’s life or genuine teachings of his.