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10 Cards in this Set

  • Front
  • Back
Antecedent
the "if" part
Consequent
the "then" part
Valid Disjunctive Syllogism
- 2nd statement has to deny one disjunct (NECESSARY).
- If one of the disjuncts if confirmed, CANNOT draw a conclusion.
Compound Statements
Makes 2 assertions.
Disjunctive Statement
2 statements separated by the word "or".
Hypothetical Statement
2 statements using "if/then".
Validity of Pure Hypothetical Syllogism
- 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.
Mixed Hypothetical Syllogism
- First premise is an "if/then" statement.
Valid Affirmative Mixed Hypothetical Syllogism
- Modus Ponens
- If P, then Q.
Affirm P.
Affirm Q.
Fallacy of Affirming the Consequent
- Invalid affirmative mixed hypothetical syllogism.
- If P, then Q.
Affirm Q.
Affirm P.