Consider the proposition: ~(S ↔ (P → S)). Which of the following options is…

Consider the proposition: ~(S ↔ (P → S)). Which of the following options is not correct about the proposition?

  1. A.

    It is a tautology

  2. B.

    It is a contingency

  3. C.

    It is a contradiction

  4. D.

    Can't be determined

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