Sadly when you have someone close in your family with dementia (my mother) you have to learn a lot about dementia if you want them to enjoy their lives as best they can (and I do). It looks like Jared has had that same sad experience.

Trump may have dementia. I'm personally for all presidential candidates having an independent set of doctors test them using standard dementia tests (like the clock-drawing test).

From what I've seen over the decades - and I wish it was much less - Trump doesn't have dementia. He's a bullshitter and a liar (not the same thing) who likes to talk because he's got a massive ego. So he ends up talking a lot of garbage that makes sense sort of, but says nothing. Kinda like Kamala Harris. I don't think she has dementia either. Or AOC, who has served up some big platters of word salad in the last few years. Nancy Pelosi? Not so sure about her.

Biden? FFS the dude can't finish half of his appearances, and those are few and far between.

Does that prove Biden has dementia? No, but he is far less coherent than Trump.