 Oh, it's called a one-time pad. It's used by everyone for high-level communications, we and the Russians and the Germans and the French and everybody else. But it does have a problem, and that's key distribution, and that's where all of the other machines come in because key distribution is easier for, say, an Enigma machine than it would be for a one-time pad. Fred, what is your definition of telepathy? What is telepathy? I don't think I've ever looked at it.