Syllogisms

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Syllogisms

  1. 1. Syllogisms A Lecture
  2. 2. SYLLOGISMS
  3. 3. The conclusion is always used toidentify the terms of the syllogism.
  4. 4. Example:
  5. 5. VALID CATEGORICAL SYLLOGISMS
  6. 6. INVALID CATEGORICAL SYLLOGISMS:
  7. 7. • “If-then” syllogism• The minor premise must either affirm the antecedent or deny the consequent.• If the minor premise affirms the antecedent the conclusion must affirm the consequent.• If the minor premise denies the consequent the conclusion must deny the antecedent.
  8. 8. VALID CONDITIONAL SYLLOGISM:
  9. 9. INVALID CONDITIONAL SYLLOGISM:
  10. 10. Ex. Ex.If you go to school, you will If you go to school, you willlearn something learn somethingYou do not go to school You learn somethingYou will not learn anything You go to school(Not necessarily! One may (Again, one may learnlearn out of school) elsewhere)

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