Learn what "how am i supposed to determine that" means, when people say it, and how to use it naturally in English.

It means the speaker is saying the information is hard or impossible to know.
From I Think My Wife Wants To Kill Me, Episode 58
The speaker asks how they are supposed to figure something out.
Use this when you want to push back on an unfair question or unclear task. It can sound frustrated or defensive, so be careful in formal settings.
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