社会不只进行着正淘汰，同时还在进行着逆淘汰，经济学讲劣币驱逐良币，指的是当政府在铜钱里掺杂质时，人们会倾向于把良币藏起来，只花劣币，久而久之，良币就被淘汰了。经济学其本质是人类活动，在社会学中这种行为被成为社会的逆淘汰，比如说“宁跟君子打一架，不跟小人说句话”，这样做的结果是君子被怼，小人被惯。久而久之，君子就被淘汰了。在没有收益的情况下，人们为了规避风险和损失，会朝着代价最小的方向做选择，这种是心理博弈后趋利避害的行为，属于博弈论的范畴，电影有[美丽心灵]。博弈论英文又叫做游戏策略，因为涉及概率，而概率是人工智能和数据分析的一部分，就可以应用到经济政治互联网等多个领域。中国古代的田忌赛马就是通过策略取胜的一例。又如吴魏双方作战时，通过了解了敌方的军马，人手，了解地形，就能列出对方可能的策略，与和我方战略的一一比较，得出胜率最大的策略。战争没开始就已知了获胜率，可以通过增加或改变获胜因素取胜。博弈论涉及逻辑学，多变量微积分。密码学，感兴趣可以看或听下[达芬奇密码]和电影[模拟游戏]，由艺术馆馆长的死亡讯息，一位数学家和一位密码学家找到了达芬奇隐藏在画最后的晚餐中的讯息，达芬奇其实是圣杯守护者之一，而圣杯的其实指基督后代，一个红发女人。（电影纯属虚构）。
The society is not only undergoing positive elimination, but also undergoing reverse elimination. Economics speaks of bad money and drives out good money. It means that when the government is doping in copper coins, people will tend to hide good money. The currency, over time, the good money was eliminated. The essence of economics is human activities. In sociology, this behavior has become the reverse elimination of society. For example, "Ning fights with a gentleman and does not say anything to the villain." The result is that the gentleman is desecrated. The villain is used to it. Over time, the gentleman was eliminated. In the absence of income, in order to avoid risks and losses, people will choose in the direction of the least cost. This is the behavior of avoiding harm after psychological game. It belongs to the category of game theory, and the film has [beauty mind]. Game theory is also called game strategy. Because it involves probability, and probability is part of artificial intelligence and data analysis, it can be applied to many fields such as economic politics and internet. The ancient Chinese Tian Ji horse racing is an example of winning by strategy. Another example is when Wu and Wei both fight, by understanding the enemy's army horses, manpower, and understanding the terrain, they can list the possible strategies of the other party, and compare with our strategy to get the best winning strategy. The winning rate is known when the war has not started, and can be won by increasing or changing the winning factor. Game theory involves logic, multivariate calculus. Cryptography, interested to see or listen to [Da Vinci Code] and movie [simulation game], by the art museum director's death message, a mathematician and a cryptographer found Da Vinci hidden in the painting In the last supper, Da Vinci was actually one of the guardians of the Holy Grail, and the Holy Grail actually refers to the descendants of Christ, a red-haired woman. (The film is purely fictitious).
