Soundness - Soundness I Review of Validity a When...

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Soundness 10/5/10 I. Review of Validity a. When evaluating arguments we should ask i. Are the premises true ii. Does the conclusion follow from the premise b. When assessing for validity, we are concerned with the second question. c. Definition of Validity: i. An argument is valid id and only is it is impossible for the premises to be true and the conclusion false. d. Test for Validity i. If the premises were true, would the conclusion have to be true as well? If yes, the argument is valid. If no, the argument is invalid. e. Both valid and invalid arguments ca n have: i. True premises and true conclusion ii. False premises and true conclusion iii. False premises and false conclusion f. Only invalid arguments can have: g. True premises and a false conclusion h. First Tricky Case of Validity: Inconsistent Propositions: i. Propositions that cannot all be true at once ii. Any argument with inconsistent premises is automatically valid i. Second Tricky Case of Validity: Logically True Propositions:
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Soundness - Soundness I Review of Validity a When...

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