👉 displicency, also known as the principle of disjunction, is a fundamental concept in propositional logic and first-order predicate calculus. It states that two propositions are logically equivalent if they have exactly the same truth values under all interpretations. In other words, if P and Q are two propositions, then P and Q are logically equivalent if P implies Q, or equivalently, Q implies P. This means that in a logical system with disjunctions, every proposition can be expressed as either of
