Just pointing out that sundowning alone isn't dementia.
It's one of the first recognizable signs. Lots of geriatric people experience years of sundowning before full blown dementia.
You seemed to be acting like dementia was a binary thing, and the same as dementia. That's not how it develops. You have nights like Biden had at the debate, slowly more and more frequently till it's not just happening at night. It's happening all the time.
Biden's team hasn't been honest about his progression, we don't know how bad it is because they're hiding it.
But we sure as shit know that it doesn't get better. And he's trying to say he's ready for 4 more years of the most stressful job in America, at a time when it's even more stressful than normal.
Biden is a risk, and even if he wins, he's not magically capable just because he won an election.
If Biden wins. We're stuck with him as president for four more years unless he dies. If he won't bow out now, he's not doing it during his second term.