He didn't remember when Beau died.
He didn't remember when he was Vice President.
He didn't remember who was on his side or against him when it came to Afghanistan.
This is late stage Reagan stuff. Period. Bury your head in the sand all you want, it won't make it go away.
Not remembering the exact year something happened is not remotely equivalent to not remembering that something happened in the first place. Some people just aren't good at years.
How do you not remember when you were Vice President. That’s literally one of most recognizable offices in the land and is an office in which the start and end date are basically fixed .
It was literally the median year of his vice presidency, too. It’s not like he just forgot that the inauguration wasn’t in November.