Honk. I'm sure that psychological condition is present, but I am pretty sure he has some degenerative brain disorder chewing up his synapses. If you watch old video of him he was much more articulate and had an decent vocabulary. He can't even remember simple words now. It's going to get worse. These things always do.
After he dies I bet it will come out that he had something like Alzheimer's or tertiary syphilis when they autopsy his brain. Maybe Mad Cow?
