人们常用“一问三不知”来嘲笑不学无术之人。其实,嘲讽他人者未必知道“三不知”的含义。“三不知”最早出自《左传》。鲁哀公二十七年,晋荀瑶率师围谓三郑,荀文子认为未了解敌情,不可冒进。他说:“君子之谋也,始、中、终皆举之,而后入焉。今我三不知而入,不亦难乎?”由此可见 People often use “ask three questions” to laugh at people who do not learn skills. In fact, people who taunt others may not necessarily know the meaning of “three unknowns”. “Sanyi” first came from “Zuo Zhuan.” In the twenty-seventh year of Lu’an’s death, Jin Yuyao led his teachers around to say San Zheng. He said that he did not understand the enemy’s situation and was not allowed to advance. He said: “A gentleman’s plan is also given to him at the beginning, middle, and end, and then he enters the courtship. Now I don’t know anything about it.”