Counterexamples: First, transcribe the following arguments intopredicate logic. Then state whether the argument is valid orinvalid. If it is invalid, provide a counterexample. (That is,provide one interpretation in which the premises are true and theconclusion is false. See the preceding section for a sampleinterpretation.)
15. If anyone is the 45th president of the United States,they’ll be famous. Barack Obama is not the 45th president of theUnited States. Therefore, Barack Obama won’t be famous.
Counterexamples: First, transcribe the following arguments into predicate logic. Then state whether the argument is vali
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