@freemo @trinsec Well, pregnancy should be one of the most obvious long-term medical diagnoses that could be made by a layman, and there are still endless stories of people fucking that up to the point where it's become a sitcom trope.
I think if you say "he likely has dementia", then you're safe, but as soon as you make a declarative statement of fact, you're on much shakier ground. For all you know, it's entirely possible that he's been severely sleep deprived for every TV appearance.