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Unformatted text preview: Modus Tollens to make a valid argument. If Janice has trouble starting her car, then her daughter Angela will check Janices spark plugs. Janice had trouble starting her car. If Brady solved the rst problem correctly, then the answer he obtained is 137. Bradys answer to the rst problem is not 137. 9. Give the reasons for each step needed to show that the following ar-gument is valid Premises: p,p q,s r,r q Conclusion: s . 1 Steps Reasons 1. p 2. p q 3. q 4. r q 5. q r 6. r 7. s r 8. s 10. Solve problems 5,6 for the previous Tutorial using rules of inference. (dicult problem, not for everyone) 2...
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- Spring '08