
Concept explainers
In Exercises 15-42, translate each argument into symbolic form. Then determine whether the argument is valid or invalid. You may use a truth table or, if applicable, compare the argument’s symbolic form to a standard valid or invalid form. (You can ignore differences in past, present, and future tense.)
If all people obey the law, then no jails are needed.

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Chapter 3 Solutions
Pearson eText for Thinking Mathematically -- Instant Access (Pearson+)
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