He never gives up, he will argue this for four years if it means he gets the last word and says you are a liar. There is something wtrong with him. For the third time I think it is, I am done with him. It serves no purpose to talk to him, none, unless you are a psychiatrist interested in such obsessive behavior You can prove a known fact to him with records and he will say no. If we all, the five or so who engage him, ignore him he will have no one to talk to, no reason to sit in his chair 16 hours a day, 365 days/year.