Build a Fully truth table and identify if tautology, Contradiction or Contingency ¬(¬(P∧Q)↔(¬P)∨(¬Q))

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From table it is clear that: $¬(¬(P∧Q)↔(¬P)∨(¬Q))$ is a contradiction.

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Question ID: mtid-5-stid-8-sqid-1371-qpid-1109