Logic 10-18 - The Categorical Syllogism October...

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The Categorical Syllogism October 4/9/16/18/25, 2007
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The wisdom of Thomas Alva Edison “Harding is all right. Any man who chews tobacco is all right.”
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Syllogisms with missing statements typically even valid syllogistic inferences do not explicitly contain all three statements one statement is often unstated, usually one of the premises, most commonly the major premise the unstated statement must be employed if the inference is warranted the type of the unstated statement can be inferred using the rules listed above
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Rules for finding missing premise Missing premise must contain the two terms that explicitly occur only once One premise must be universal One premise must be affirmative Affirmative conclusion requires both premises to be affirmative Negative conclusion requires one negative premise One premise must have quantity of conclusion
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The wisdom of Thomas Alva Edison “Harding is all right. Any man who chews tobacco is all right.”
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The wisdom of TAE Conclusion - ‘Harding is all right’ Major term – ‘all right’ [a] Minor term – ‘Harding’ [h] Middle term – ‘chews tobacco’ [c] The syllogism A c – a (Sa) (h – c) Sa h – a
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Rules for finding missing conclusion Missing conclusion must contain the two terms that occur only once
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This note was uploaded on 04/07/2008 for the course PHIL 115 taught by Professor Stoltz during the Fall '07 term at St. Thomas.

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Logic 10-18 - The Categorical Syllogism October...

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