“Are you saying that you don’t believe he has brain cancer? What would be his reason for claiming he does.”
The last sentence of yours is also one of the questions on the list. I don’t know; my gut just never thought it was true. To get sympathy? To get a pass for any and every dumb-ass thing he says or does — every vote he casts? I don’t know. I’m probably wrong... I hope I’m wrong.
He can claim he lost his sanity from illness. My mom became irrational with the same.