一物不知

Explanation: Some do not know of a thing. Metaphor of knowledge are inadequate. 　　Source: Han Yang Xiong "Saying gentleman" sage of the world, a thing of shame I do not know. " 　　Examples: On the play ~, Confucian shame, "the truth, this is a legitimate way. ★ Qing Zeng Pu," Flower, "the second time