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Propositional logic/Tautology/Commutativity law/Truth table/Exercise
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From Wikiversity
Prove, using truth tables, that the following statements are tautologies.
α
∧
β
⟷
β
∧
α
{\displaystyle {}\alpha \wedge \beta \longleftrightarrow \beta \wedge \alpha }
.
α
∨
β
⟷
β
∨
α
{\displaystyle {}\alpha \vee \beta \longleftrightarrow \beta \vee \alpha }
.
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Category
:
Mathematical exercise
.
.