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A logical statement combining two statements, truth values, or formulas P and Q in such a way that the outcome is true only if P and Q are both true or both false, as indicated in the table.

The biconditional connective can be represented byand is read as “if and only if” or “iff” or “is equivalent to”. Note that P ≍ Q has the same truth table as the conjunctionwhere → denotes a simple conditional. The biconditional connective itself is also known as the biconditional.

Biconditional. Truth table

Subjects: Psychology — Computing.

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