translation.en: Assuming that a few of you did not do the assigned reading, very quickly, the key idea is the distinction between zero-sum games, in which correlations are inverse: always a winner and a loser.
translation.zh: 考虑到有些人可能没有看过阅读资料， 在零和博弈中，博弈者的关系是对立的： 一个赢家，一个输家。