Can you guess what card your friend picked out of a deck by putting them through a bizarre interrogation? Maybe - or you can try this much easier and much more devious method! The Setup: Couldn't be simpler. A borrowed deck of cards is totally shuffled, and a random card is selected. There's no marked cards, no forces, and the sucker truly does have a free choice of their card. Next, you begin asking a series of questions about their card, about which they can choose to lie or tell the truth... amazingly, it doesn't matter what they say, as you're ALWAYS able to tell when they're lying!