知之为知之，不知为不知 (知之為知之，不知為不知) zhī zhī wèi zhī zhī, bù zhī wèi bù zhī

zhī zhī wèi zhī zhī, bù zhī wèi bù zhī phrase When you know a thing, to hold that you know it and when you do not know a thing, to admit that you do not know it.
Domain: Proverb 谚语
Notes: Quote: from Book 2 為政 Wei Zheng of the 論語 “Analects of Confucius” (retranslated from Legge 1861, vol. 1, Confucian Analects, p. 15; Guoyu '知之為知之，不知為不知')