Confucius

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.
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.
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These are some quotes by Chinese author Confucius Philosopher, who lived between 551 BC and 479 BC.