The biconditional connective can be represented by ≡ — <—> or <=>
and is read as “if and only if” or “iff” or “is equivalent to”. Note that P ≡ Q has the same truth table as the conjunction (P → Q) ∧ (Q → P)
where → denotes a simple conditional. The biconditional connective itself is also known as the biconditional.
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