Smart!

Oliver: Hey what makes you so sure I went to prep school?
Jennifer: You look stupid and rich.
Oliver: Actually I'm smart and poor.
Jennifer: Uh-uh, I'm smart and poor.
Oliver: What makes you so smart?
Jennifer: I wouldn't go for coffee with you.
Oliver: Yeah well I wouldn't ask you.
Jennifer: Well, that's what makes you stupid.

~ Love Story (1970)