Discrete Mathematics and Its Applications | 1 CHAPTER The Foundations: Logic and Proofs | 1.1 Propositional
propositionalvariables(orstatementvariables),lettersusedforpropositionalvariablesarep,q,r,s,....Thetruthvalueofapropositionistrue,denotedbyT,ifitisatrueproposition,andthetruthvalueofapropositionisfals