What baffles me is, why doesn't Biden get checked for Parkinson's or just a neurological exam ?
If various people were indicating to me that I should get checked for a condition they noticed, I'd do it for my own good.
Example: My wife insisted I get my hearing checked. For months I said there's nothing wrong w/ my hearing, it's just her Sachsen accent which sounds somewhat mumbling.
Finally I got checked and sure enough I had high frequency hearing loss and now wear hearing aids where there is background noise like at a restaurant, e.g., and it's helped tremendously.
It's obvious he has the symptoms of Parkinson's and has had them for a while. I personally know someone quite well who is in the depths of it and the similarities to what I see in Biden are remarkable. I see and hear almost exactly the same thing. He's an old friend (in both ways) and it's now almost impossible to have any kind of meaningful conversation with him, although he tries.
Even if he doesn't have Parkinson's it's also obvious that something is going on with him.
I think we've all known elderly folks that are sharp as a tack, even in their 90's. Biden is NOT one of them.
His stubborn denialism is another factor to consider.

And his family is NOT helping the situation, at all.