You know, you keep taking everything on faith. How do you know ...
MEREDITH: "You know, you keep taking everything on faith. How do you know whatâ€™s real and whatâ€™s not?"
DEREK: "You just do. You know some people would call this a relationship. Time to exchange keys, leave your toothbrush over."
MEREDITH: "Who, who would call it that?"
DEREK: "Me, I would."
MEREDITH: "And Iâ€™m supposed to believe you. Show me something. Give me a reason to believe."