“there are three kinds of people in the world: those who don't know and don't know they don't know; those who don't know and do know they don't know; and those who know and know how much they still don't know.”

“Every time I think I’m getting smarter I realize that I’ve just done something stupid. Dad says there are three kinds of people in the world: those who don’t know, and don’t know they don’t know; those who don’t know and do know they don’t know; and those who know and know how much they still don’t know.Heavy stuff, I know. I think I’ve finally graduated from the don’t-knows that don’t know to the don’t-knowsthat do.”

“Even I don't know what you're doing, and I know everything.”

“I don't know about you, but I call impromptu vomiting harm.”

“Kids. Pain in the ass. Don't know why I ever made them. Hell on relationships.”

“When do these three days expire?""That's what pisses me off. I don't know. He was annoyingly vague.""The nerve. Threatening you and not being precise about it.”

“There are those who know and those who don't know. And for every ten thousand who don't know there's only one who knows. That's the miracle of all time--the fact that these millions know so much but don't know this.”