反证法也能出奇制胜

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相传三国时代,蜀国丞相兼军师诸葛亮屯兵阳平(今陕西阳平关)时,派大将魏延领兵去攻打魏国,只留下少数老弱军士守城,不料魏国大都督司马懿率大队兵马杀来.靠几个老弱军士出城应战,有如鸡蛋碰石头,怎么办?诸葛亮冷静思考之后,传令大开城门,让老弱军士在城门口清扫道路;自己则登上城楼,摆好香案,端坐弹琴,态度从容,琴声优雅.司马懿来到城前,见此情况,心中疑惑:诸葛亮一生精明过人,谨慎有余,从不冒险.今天如此这般,与其一生表现矛盾.恐怕城内必有伏兵,故意诱我入城.决不能中计也!于是急令退兵. 诸葛亮正是利用了司马懿这种心理上的矛盾.才以“不守城”来达到暂时“守住城”的目的.诸葛亮从问题(守住城)的反面 According to legend, during the Three Kingdoms era, when Zhuge Liang, the prime minister and military advisor of the Shu State and Zhuge Liang, went to Yangpingguan (now Yangpingguan in Shaanxi Province), he sent generals Wei Yan to attack Weiguo, leaving behind only a handful of old and weak sergeants defending the city. Killed by several old and weak sergeants out of the city to fight, like an egg to touch a stone, how to do? Zhuge Liang calm thinking, the order to open the city gate, so that the old and weak sergeant sweeping the road in the city gate; he boarded the tower, set the incense, Sitting on the piano, he was calm and calm. Sima Yi came to the city. Seeing this situation, he was puzzled: Zhuge Liang was a savvy man in his life. He was cautious and never risked. Today is such a thing, his performance contradicts his life. I am afraid that the city must There are ambush, deliberately induced me to enter the city. Must not be counted too! So hurry to retreat. Zhuge Liang is the use of the psychological contradiction of Sima Yi. Only “do not defend the city” to achieve the purpose of “holding the city” temporarily. Zhuge Liang From the back of the problem (hold the city)
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