Customer: "Do you have 'Dr. Who and the Secrets of the Hidden Planet of Time'?"
Bookseller: "I'm not familiar with that one. Hang on and I'll check our system for you... I'm afraid I can't find it in our database or a reference to it online. Are you sure you've got the right title?"
Customer: "No, not at all. I don't know that it actually exists."
Bookseller: "What do you mean?"
Customer: "Oh, I was just driving to work yesterday and I thought up the title and I thought, 'Now that sounds like the kind of book I'd like to read,' you know?" (from Campbell)
