那个高人用英语翻译下知之为知之，不知为不知，是知也

When you know a thing, to hold that you know it; and when you do not know a thing, to allow that you do not know it;-this is knowledge.

知之为知之，不知为不知，是知也
【译文】：
Knowledge is to know what is knowledge and what is not.

....know is know,don't know is know ,it's smart...
挖哈哈...

Know is know,no know is no konw,it'clever.