Devoid of Substance

Judge01: So, Joe, what do you know?
Steve Slacker: Shoot, you know! I forgot what I know!
Judge01: I don’t know. OK.
Steve Slacker: I don’t know either!
Judge01: Why not?
Steve Slacker: Why? Why not?
Judge01: Why?
Steve Slacker: Why should I answer that?
Judge01: Why not?
Steve Slacker: Why?