Learn what "if only i knew where it worked" means, when people say it, and how to use it naturally in English.

This expresses regret or frustration about not knowing something important.
From Do Not Deceive Me, Episode 11
The speaker imagines a regretful situation where they wish they knew the answer.
Use it to sound reflective or disappointed about missing information. The sentence is a little unnatural out of context, so it is better as a dramatic line than a daily phrase.
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