"Alicia, does our relationship warrant long-term commitment? Because I need some kind of proof, some kind of verifiable empirical data."
[Laughs nervously] "...I'm sorry... Just give me a moment... to redefine my girlish notions of romance. A proof? Verifiable data. Okay. Well, how big is the universe?"
"How do you know?"
"Because all of the data indicates it."
"But it hasn't been proven yet? You haven't seen it. How do you know for sure?"
"I don't. I just believe it."
[Shrugs] "It's the same with love, I guess... [Long pause as he thinks this over] Now... the part that you *don't* know, is if I want to marry you."