Just as I would do with any encounter report, either long and detailed like his, or fleeting and short on description, I put it on the pile labeled, "Needs to be explained." Until it is, it is an open question. Opinions of whether it is truthful or not, mine included, do not matter, but it does jibe with some other accounts and it predates the vast majority of those as well. Given the passage of time and unlikelihood of any new evidence coming to light to confirm/deny, this episode will probably remain beyond further explanation.