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Which of the following is a tautology?(a) p ⇒ (q ∨ ~ q)(b) p ⇔ (~q ∧ p)(c) p ⇔ (p ∧ ~ p)(d) (p ∧ ~ p) ∧ q |
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Answer» Which of the following is a tautology? (a) p ⇒ (q ∨ ~ q) (b) p ⇔ (~q ∧ p) (c) p ⇔ (p ∧ ~ p) (d) (p ∧ ~ p) ∧ q |
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