XOR

XOR stands for "exclusive or". That means it is a way of comparing two things to see if they are different from each other. If they are the same, then it will return false. If they are different, then it will return true. Think of it like playing a game of Tic Tac Toe. If two players take turns putting their X's and O's in different boxes, then the game will return false (no one has won yet). But if one player puts their X in the same box as the other player's O, then the game will return true (one of the players has won!).