Three cards are shown, one with a blue diamond and the other two with red diamonds. All the spectator has to do is find the card with the blue diamond. If he finds it, he wins a dollar. If he's wrong, he loses a dollar. Before long, he has lost seven dollars! For double or nothing, the spectator is shown one blue diamond card and one red diamond card, and asked to guess the color of the diamond on the third card. Of course the spectator guesses it is red, and of course he is wrong- the third card has a green "$14"- because the spectator owes $14!