Games reflect an important part of human psychology. One broad way to think about "games" is that they are any situation that has: (a) a set of rules (explicit or implicit) that are made up by humans, (b) a scoring system (explicit or implicit) for determining how players are doing or for deciding who wins, (c) participants who are trying to increase their "score," and (d) a game context (outside of which the game rules stop applying). So, by this definition, games include ch...