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Theorem 2.1.1 Logical Equivalences Given any statement variables p, q, and , a tautology t and a contradiction c, the following logical equivalences hold 1.

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Theorem 2.1.1 Logical Equivalences Given any statement variables p, q, and , a tautology t and a contradiction c, the following logical equivalences hold 1. Commutative laws 2. Associative laws: 3. Distributive laws: 4. Identity laws. 5. Negation laws: 6. Double negative law: 7. Idempotent laws 8. Universal bound laws 9. De Morgan's laws: 10. Absorption laws 11. Negations of t and c pvt

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