“According to the Shuos," Jedao said, "games are about behavior modification. The rules constrain some behaviors and reward others. Of course, people cheat, and there are consequences around that, too, so implicit rules and social context are just as important. Meaningless cards, tokens, and symbols become invested with value and significance in the world of the game. In a sense, all calendrical war is a game between competing sets of rules, fueled by the coherence of our beliefs. To win a calendrical war, you have to understand how game systems work.”