Soundness - Todays Topics(10/5 I II III Review of Validity...

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3/4/11 Today’s Topics (10/5) I. Review of Validity II. Soundness III. The Conclusion of a Sound Argument is True
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3/4/11 I. Review of Validity When evaluating arguments, we should ask: a. Are the premises true?; and b. Does the conclusion follow from the premises? When assessing for validity, we are
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3/4/11 Definition of Validity: An argument is valid if and only if it is impossible for the premises to be true and the conclusion false. Test for Validity:
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3/4/11 First Tricky Case of Validity 1. Avatar won the Academy Award for Best Picture. 2. Avatar did not Valid argument Inconsistent Premises 1. Avatar won the Academy Award for Best Picture. 2. Avatar did not Inconsistent Propositions: Propositions that cannot all be true at once. Any argument with inconsistent premises is automatically valid.
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3/4/11 Second Tricky Case of Validity Valid Argument True Premises 1. Barack Obama is the President. 2. If Harry gets
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Soundness - Todays Topics(10/5 I II III Review of Validity...

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