Sure. And people who stutter make more gaffes than those who don't. Unlike trump and his deliberate name-calling, Biden didn't do this to be a smart aleck. MAGATs suck.
I've encountered a few stutterers in the last 10 or 15 years. You have to look for it, as they all learn coping mechanisms.
The most recent was an owner of a GMC dealership when I was shopping for a new truck a few years ago. I was dealing directly with him, and we had a great discussion about how he grew up in the showroom when his grandfather started the business. It's easy to tell when a person suffers from a stutter, as they are very measured when they speak. Often there are tiny glimpses of a struggle.
Across the board, I notice that under stress the coping mechanisms aren't as effective. I was in negotiations for a new truck with this very kind man. I let him give me his pitch as he wrote numbers all over a sheet of paper. They all love to write numbers.
I showed up there knowing invoice price on the vehicle, which is important in negotiations. There was about $6k in incentives, as the truck was a leftover. He finished speaking, and I calmly told him that if he wanted to work off of invoice I would take the truck.
Suddenly, he couldn't speak as he gave me reasons why he couldn't do that. Of course he
could do it. He didn't want to. I felt badly, but was very polite as I told him that he was very helpful. I gathered up the papers and told him that I'll chew on it. What I meant, was that he really needs to chew on it because he was letting me walk out the door. He had three of these trucks that were just sitting there from last year.
Ironically, I missed my turn on the way home and accidentally found a Ford dealership that had a better truck that they let go at invoice.
To the point...it was as if someone threw a switch once I stressed him out. His coping mechanisms weren't as effective.
I remember during the Biden/trump debate that Biden began to struggle when trump wouldn't shut the hell up.
If Biden faltered with a name he didn't read properly, it was because he was being heckled and was prepared to counter the attack. His timing just got a little messed up.