"tautologies" - 1 õppematerjal

Kaasaegne teaduslik mõtlemine ja filosoofilised meetodid

T T T T F T T T T T Excercise Construct the truth Table of Compound Proposition: P does not imply Q ¬ (P → Q) ¬ (P → Q) F F T F F F T T T T F F F T T T Tautologies and Contradictions When a proposition is always true, it is called a ​Tautology. Example:​ P ↔ P P ↔ P F T F T T T When a proposition is always false, it is called a ​Contradiction. Example:​ P ↔ ¬ P P ↔ ¬ P F F T F T F F T Using Truth-tables to evaluate Arguments