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10 Cards in this Set
- Front
- Back
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Antecedent
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the "if" part
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Consequent
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the "then" part
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Valid Disjunctive Syllogism
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- 2nd statement has to deny one disjunct (NECESSARY).
- If one of the disjuncts if confirmed, CANNOT draw a conclusion. |
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Compound Statements
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Makes 2 assertions.
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Disjunctive Statement
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2 statements separated by the word "or".
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Hypothetical Statement
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2 statements using "if/then".
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Validity of Pure Hypothetical Syllogism
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- First, identify the 3 hypothetical statements.
- If A, then B. If B, then C. If A, then C. - Just look at the 2nd statement to test for validity. |
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Mixed Hypothetical Syllogism
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- First premise is an "if/then" statement.
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Valid Affirmative Mixed Hypothetical Syllogism
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- Modus Ponens
- If P, then Q. Affirm P. Affirm Q. |
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Fallacy of Affirming the Consequent
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- Invalid affirmative mixed hypothetical syllogism.
- If P, then Q. Affirm Q. Affirm P. |
