It can be tough to remember all of the win-loss combinations involved in Sheldon Cooper's version of Rock, Paper, Scissors. Luckily, this officially licensed "Big Bang Theory" t-shirt illustrates the rules for you: "Scissors cuts paper, paper covers rock, rock crushes lizard, lizard poisons Spock, Spock smashes scissors, scissors decapitate lizard, lizard eats paper, paper disproves Spock, Spock vaporizes rock, and rock crushes scissors." Oh, and just in case you were wondering, Spock ties Spock.