10. Checking Books for Damage

A: There's a huge rip here.

B: But there's tape on it!

A: Did you put the tape there?

B: No, it was there before.

A: I know you're lying to me.

B: If you know, then why did you ask if I put the tape on?

A: I wanted to see if you were a liar or not.

B: How did you know I'm lying?

A: Before you check out the book, the librarian checks it for damage.

B: Wow, you guys think of everything.

A: Yes. Anyways, you owe $10.

B: Fine, here you go.