BELIEVER: (holds up a banana) "This is an orange."

SKEPTIC: "I don't think so. What makes you say that?

BELIEVER: "I have a book, and it says this is an orange."

SKEPTIC: "What if the book is wrong."

BELIEVER: "The book cannot be wrong. It is infallable."

SKEPTIC: "What makes you say that?"

BELIEVER: "The guy who wrote the book says it came straight from God."

SKEPTIC: "How do you know it came from God."

BELIEVER: "It says so in the book."

SKEPTIC: "I have a book, too, and my book says that is a banana."

BELIEVER: "Your book is wrong."