My dad confronted me about an incident in which I got angry with him and said some pretty terrible things (miles outside my character and our experiences) I was pretty floored as he seemed perfectly convinced it happened. I felt pretty awful, one, because he was upset and two, because it didn't happen. I apologized to smooth things over.
He is almost 80 and has a bit of trouble with recall (names mainly and incidental details) I haven't seen anything like this though. Is this kind of thing normal, what should my concerns be? Any advice or insight would be appreciated.