It’s not one mistake. It’s four years of obvious decline being put on stage where people have a harder time covering it up.
He’s an old man. Congrats on figuring that out.
As I can attest, older people in general are a little bumbly but that’s not a predictor of mental acuity or ability. It’s certainly not an indicator of dementia on it’s own.
I’ve watched many of his speeches, press conferences, etc. and I see little to no evidence of cognitive decline. What I do see is people buying into that narrative because, like all good propaganda, it taps right into their preexisting biases.