Learn what "you should know" means, when people say it, and how to use it naturally in English.

It means a situation is more complicated than it first appears.
From Undercovered Heart, Episode 3
Someone is telling another person not to oversimplify the situation.
Use this in disagreements when you want to push back against a simplistic view. It is natural but often sounds defensive or argumentative.
Scenes unlock real expressions as you watch
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