Question: Show by logical derivation (apply logical equivalency laws step by step to show) that ( q p) (p q) is a tautology. Write the name

Show by logical derivation (apply logical equivalency laws step by step to show) that ( q p) (p q) is a tautology. Write the name of the law that you use at each step. You can write and, or, not instead of using symbols , , respectively.

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