Little girl in stall with her mother: Are you going to go?
Mother: No.
Little girl: You aren't going to go?
Mother: No.
Little girl: You aren't going to go?
Mother: No, I don't have to go.
Little girl: But you said you had to go!
Mother: I changed my mind.
Little girl: That's not something you can change your mind about! –Ladies' Room, Saks Fifth Avenue Overheard by: Harriet Vane