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Past Exam for PHIL 120 - INTRO TO LOGIC with Cohen at Washington (UW)

Exam Information

Material Type:Final
Professor:Cohen
Class:PHIL 120 - INTRO TO LOGIC
Subject:Philosophy
University:University of Washington - Seattle
Term:Autumn 2007
Keywords:
  • Either...or
  • Tetrahedron
  • Descriptions
  • Contradiction
  • Conjunction
  • Conditional
  • In Front (of)
  • In Front Of
  • Propositional
  • False Statement
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Sample Document Text

PHIL 120 Intro to Logic Answers to Final Exam Practice Questions Answers to multiple choice questions are listed here. For more detailed explanations, see the next section; it should help you figure out why any of your answers was incorrect. 1. e 2. d 3. e 4. a 5. e 6. d 7. c 8. a 9. e 10. c 11. e 12. e 13. e 14. b 15. d 16. i 17. 6. ? Elim: 5 7. Tet(a) ? a = c 8. ? Elim 9. ? Elim: 6 10. ? Elim: 4, 9 11. a = b 12. ? Elim: 1, 5-11 18. f Explanations 1. Which of the following are logical truths, but not FO-validities? a. ?x ¬(Square(x) ? Circle(x)) b. Cube(a) ? ¬Cube(a) Tautology, hence FO-valid. c. Dodec(d) ? d = c ? Cube(c) Not a logical truth. d. ?x SameRow(x, x) e. (a) and (d) This is the correct answer. 2. Which of the following are FO-validities, but not tautologies? a. c = c ? c = c Tautology. b. ?x ¬Larger(x, x) Logical truth, but not FO-valid. c. ¬(Large(a) ? Adjoins(a, b)) TW-true, but not FO-valid. d. ?...

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