how should I know

• how am I to know
• how do I know
• how would I know

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how should I know?

1. A rhetorical question asked to show that the person asking it neither knows the answer nor would be able to know it; sometimes therefore also implying that the asker was wrong to ask the askee at all.

   Antonym: I know

   Near-synonyms: God knows, who knows, I don't know

• “how should I know”, in Cambridge English Dictionary, Cambridge, Cambridgeshire: Cambridge University Press, 1999–present.
• “how should do I know” (US) / “how should do I know” (UK) in Macmillan English Dictionary.
• “how should I know how am I to know how do I know” in Longman Dictionary of Contemporary English, Longman.