Learn what "you think you know everything but you don't" means, when people say it, and how to use it naturally in English.

It means the speaker is criticizing someone for acting overconfident or arrogant.
From Two Worlds Apart, Episode 42
The speaker insults the other person by saying they think they know everything but do not.
Use this in an argument to call out arrogance. It is common and easy to understand, but it is direct and rude.
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