Why these puns are funny tell the reason: 1:The grammarian was very logical. He had alot of comma sense.
2:I was struggling to figure out how lightning works then it stuck me.

In 2081, everyone is equal not only in the eyes of the law but in every way; nobody is smarter, more athletic, better looking, etc. than anyone else. hazel is of average intelligence, which means she can't think about anything except in short bursts, and george has an intelligence way above normal.