If And Only If

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Proposition / Logic / Mathematical Proof / If And Only If / Truth

Proposition / Validity / Logic / If And Only If / Argument

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Proposition / If And Only If / Truth / Logic / Mathematical Logic

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Proposition / Validity / Logic / Truth / If And Only If

If And Only If / Proposition / Syntax (Logic) / Formalism (Deductive) / Mathematics

Proposition / If And Only If / Logic / Physics & Mathematics / Mathematics

If And Only If / Proposition / Logical Consequence / Justification / Contemporary Philosophy