As crazy as that sounds he suffers or has suffered from seizures ~ and was prescribed anti-seizure medication.
It's not that he's crazy, but his brain is not operating in what we would think of as a normal manner.
Used to read through my friend's epileptic musings ~ hundreds of 3 ring binders filled with stream of consciousness stuff ~ then he finally had a terminal seizure.
He used every medication they had but he didn't use depakote ~ it wasn't on the market then. The man was pretty bright and had a law degree from a serious school. He was lucid to the end BUT he had this writing thing ~ and I'll be doggoned, it looks like Roberts is doing that too ~ but the silly Associate Justices, all very serious minded folks, seem not to have had it occur to them that Robert's performance was NOT RIGHT.
Interesting times...