Well, this was my high school, sooo it's been a while! I learned that he just doesn't care. It's sort of hilarious. I still remember a kid asking him a question and his reply was the most half assed "I dunno," with a shrug of the shoulders ever.
Dude, this guy was like, completely blazed out of his mind most of the time. And he had no problems telling this to a class of kids. It was the most amusing day at school I can remember. He acts exactly like I'd imagine someone totally high would. Which, y'know, is amazing for the middle of the school day.