"I bought a donut, and the guy gave me a receipt for the donut. I don't need a receipt for a donut. I give you the money, you give me the donut. End of transaction. We don't need to bring ink and paper into it. I just cannot imagine a scenario where I would have to prove that I bought a donut. Some skeptical friend. 'Hey man, don't even act like I didn't get that donut. I got the documentation right here... Oh wait it's at home in the file. Under D.' "
r.i.p. mitch hedberg. you will be missed.