There is only one sentence to prove that you have studied the Analects of Confucius. What would you say?

A person's real knowledge lies in knowing what he knows and what he doesn't know. This is a famous saying of Confucius, which is used to remind people to treat knowledge with honesty and not to be hypocritical and proud. It is necessary to develop a down-to-earth, serious attitude towards learning, a style of seeking truth from facts, and avoid reckless and grandiose atmosphere.

But there is another saying: Professor Ceng Shiqiang gave an example of a student of Confucius who made a bet with a grasshopper. The grasshopper says there are three seasons in a year, and Confucius' students say there are four seasons. Later, they asked Confucius together. Confucius looked at the grasshopper and told them that there are three seasons in a year.

After the grasshopper left, Confucius' students asked why. Confucius said that grasshoppers don't live in autumn, so for him, there are three seasons in a year, and there are still three seasons for you to fight with him. Therefore, "knowing is knowing, not knowing is not knowing" should mean "knowing some knowledge" with the purpose of "knowing this knowledge". (knowing is knowing), and the second half is the same.

Only if you don't know can you know. Lv Duan and Song Taizong, ministers of the Song Dynasty, called him "not careless in small matters, not careless in big matters", which is a good example of abandoning "Xiao Zhi" as "great wisdom". Based on this, Zhang Shizhi defended Shanglin Wei in Hanshu, which was understood by Wendi.