One thing: as people have said, many have known someone who declined rapidly. But we’ve *also* someone who was cognitively aces but gets treated as an idiot because of physical and/or superficial issues. And…
(1) a lot of the coverage badly conflates serious and non-problenms; (2) Republicans spent 4 years conflating them (3) I suspect a lot of us bring our experiences to this, for better and worse.
Biden really needs to go saying "Trump's cognitive test was repeating Man Woman Person TV Camera a few times, getting the year right, and saying he was President.
Well, now I'm President, and it's a bit tougher for Trump to pass than me."