He doesn't have dementia. He is a sociopath. He becomes unhinged when he is challenged.
And he's old.
His mental shortcomings are far more dangerous than dementia.

@KunsanVeteran Nobody knows more about cognitive tests than the 'Unstable Genius'.

"The only person, ever, to receive 'extra points' on a cognitive test"

"A president can declassify files by thinking about it"

Autocrat: A president with total power. Taking no account of other people's wishes, opinions, concerns, or needs. (Tariffs)
E. Jean Carroll v. Donald Trump. 2 related lawsuits by Carroll that he lost.

"Getting revenge is a necessity on anyone he believed wronged him" Told to Charlie Rose 1992

I really don’t believe Trump aced his cognitive test. I think Trump’s aids put a poorly tailored blue suit and an extra long red tie on an Orangutan and sent it into the testing room. And I’m pretty sure he weighs more than 224 pounds (Trump not the orangutan). Cheers!

Lol. Got “every answer right”.

Good Lord. Proof right there that he either did not take the test, has no idea if he took the test, or is deliberately lying.

There are no “right” and “wrong” answers on such a test.