The following is an invalid argument: Jim is between fifty and sixty years old. Jan is older than Jim. So Jan is older than sixty.

Name: The following is an invalid argument: Jim is between fifty and sixty years old. Jan is older than Jim. So Jan is older than sixty.
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Question

Quizplus · Accepted Answer

The conclusion that Jan is older than sixty does not necessarily follow from the premises given, because Jim could be any age between fifty and sixty, making it possible for Jan to be older than Jim but still under sixty.

The Following Is an Invalid Argument: Jim Is Between Fifty