[PDF] Mathematical Logic Propositional and Predicate Logic:
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Definition 4 (Logical Equivalence). Two formulas or propositions P and Q are said to be logically equivalent (denoted P ≡ Q) if they have the same meaning.
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Definition 4 (Logical Equivalence). Two formulas or propositions P and Q are said to be logically equivalent (denoted P ≡ Q) if they have the same meaning.