Logic - OpenTextBookStore
This is not a tautology, so this is an invalid argument. 14. Let b = brushed teeth and w = toothbrush is wet. Premise: b → w Premise: ~w Conclusion: ~b This argument is valid by the Law of Contraposition. 15. This argument is valid by the Transitive Property, which can involve more than two premises, as long as they continue the chain reaction. ................
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