Trump and Biden both, act like they are both suffering very early stages of some kind of dementia.
Seriously. Does not fit with Alzheimers, but there are many kinds of dementia. Trump doesn't know who or what QAnon is, other than that they seem to agree with him. (and because he's obviously "
Right(tm)", that means they are A-OK.) That they are batshit crazy, never occurs to him. Again, because he is "Right(tm)". (like basically all dementia sufferers believe.)
Biden is much the same way. This is why the debate devolved into a shitshow, rather than a calm and reasoned debate. The ability to comprehend a contradiction with one's internal narrative, and flexibly adapt and change one's position (which is essential for debate to actually, you know, WORK) is one of the things that is lost due to dementia. You have two competing "TRUTH!" speakers, who just devolved deeper and deeper into name calling and histrionics.
I am not really qualified to make such diagnoses; Hell, a proper mental health professional would be loathe to make an impromptu diagnosis. As such, I am not saying "They totally have dementia"-- I am saying instead that their behavior is characteristic of persons with dementia.