Why are people ruling it out? I'm not saying he is, only that like many adults, he could be undiagnosed. Some things like messing up words and basically thinking faster than you get your words out, being socially awkward are signs of autism. He exhibits those signs and seems to have done so for decades.
And I deal with personally forgetting facts and people and places or at least words daily, and have most of my own life. I have bouts of being socially awkward, unable to determine what is appropriate. These claims against Biden forgetting things or jumbling words aren't new, coming on in the last few years.
I've given you some of the symptoms. We have no idea whether he had others that could have been overcome, controlled with age.
Yes it can. But that doesn't mean his stuttering is not connected to being autistic, which shouldn't be seen as a disorder either. It is simply being neurological atypical. The pathways work differently than "normal". To what extent and which ones, including how many function at that different determines how severely autism is seen in a person.
I've stated I worked for past employers, mistakenly. Ive called a brother Chief "Chief" without thinking, something that isn't normal. I've said wrong names more than a few times.
Diagnosing autism is generally based off of childhood investigations into the multiple things that go into it. We cannot know.
It would take a study of his childhood. Likely unless he or siblings, friends, other relatives can actually remember, it would be hard to diagnose. I don't intend to get anything. I'm presenting a possible explanation besides "senility" when someone seems to have been doing such things for a while.
Cancer causes health problems. Autism is simply thinking different than the normal, having neurons that fire different and/or at a different rate than most peoples work. Most people have autism without any real affect on their lives except they are different than the norm.