From yesterday's Washington Post:

A ‘whale’ of a tale: Trump continues to distort cognitive test he took
The Montreal Cognitive Assessment, a test aimed at detecting dementia or cognitive decline, never included the combination of animals Trump identified this week

I particularly like the quote

Experts also note that the assessment is not an I.Q. or intelligence test, though Trump has often talked about it as if it was.

“It’s a very, very low bar for somebody who carries the nuclear launch codes in their pocket to pass and certainly nothing to brag about,” said Jonathan Reiner, a cardiologist and professor of medicine and surgery at the George Washington School of Medicine & Health Sciences.

Addressing the crowd of supporters Wednesday night in Portsmouth, Trump continued with his riff on the test, seeming to wholly invent another hypothetical question.

The irony about the whole age debate is that Biden is a good weight, eats a healthy diet, and has all of his marbles. The stammer occasionally rears it's head to make some of his speech halting, but he's the one people worry about? They can't see past the mess of Trump's pancake makeup and hair gel.