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  3. 7 express each of these statements using logical operators predicates...

Question: 7 express each of these statements using logical operators predicates...

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7. Express each of these statements using logical operators, predicates, and quantifiers. a) Some propositions are tautologies. b) The negation of a contradiction is a tautology c) The disjunction of two contingencies can be a tautology. d) The conjunction of two tautologies is a tautology.
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