Bill: I'm going to stop at the hardware store on the way home to get some oil for the cooler.

H: OK. Can you get a handle for the toilet too?

Bill: Are you sure it's broken?

H: No, but it's about to break.

Bill: Are you sure it's not just loose?

H: Um...I don't know. Can you tighten handles?

Bill: Well, I can if I know it's loose.

H: Well, how did you know it wasn't broken?