English phrase from drama scenes

What Does "you should at least know this" Mean?

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

Intermediate
Rude
Firm
Confront

You should at least know this.

The speaker is saying the other person ought to know this already and sounds annoyed or judgmental.

From Love Lies And Bloodline, Episode 48

When do people say this?

Scene Context

Someone is criticizing another person for not already knowing an important fact.

Usage Scenario

Use this when correcting someone, but it can sound rude or impatient. It is not a polite teaching phrase.

Better ways to say it

1
You should at least know this.
2
You should know this.
3
You need to know this.

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