To know what you know and what you do not know, that is true knowledge.
知道自己知道的和不知道的，这才是真正的知识。
-- Confucius 孔子
To know what you know and what you do not know, that is true knowledge.
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To know what you know and what you do not know, that is true knowledge.
知道自己知道的和不知道的，这才是真正的知识。
-- Confucius 孔子
