questioning a person's personal family anecdote or claim because no outsider was there to see and to understand what routinely occurred behind closed doors.

I assume that she is long since passed away and that no other family member is prepared to correct Barack on his family reminisces.

Nor does it really matter. Perhaps it really occurred, perhaps it didn't but he believes that it did, perhaps he's just being a typical stinking politician and making it all up. The fact is that it's impossible to refute.