Today’s Topics. Symbolizing conditionals and bi-conditionals Other complex symbolizations. Unless. Conditional. A conditional is composed of two elements, the antecedent (the ‘if’ part of an if, then, statement) and the consequent (the ‘then’ part)
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P is both necessary and sufficient for Q
(P is necessary for Q) AND (P is sufficient for Q)
(Q P) & (P Q)
(P if Q) and (P only if Q)
P Q (P if and only if Q)