7. [(X A) (B Y)] [(B Y) (A X)] • • a. True. b. 8. In problem 7, the main operator is a: a. Wedge. b. c. Dot. d. Horseshoe. Section 3. Use ordinary truth tables to answer problems 9-15 (12 @ 3 points = 36 points): 9. Given the statement: (N K) (K N) This statement is: a. Contingent. b. Inconsistent. c. Tautologous. d. Self-contradictory. 10. Given the statement: (G Q) (Q G) • This statement is: a. Self-contradictory. b. Tautologous. c. Contingent. d. Logically equivalent. 11. the statement: [ H (E D)] [(H E) (H D)] • • • This statement is: a. Tautologous. b. Valid. c. Contingent. d. Self-contradictory. 12. the pair of statements: (S Q) and Q S • These statements are: a. Logically equivalent. b. Valid. c. Contradictory. d. Inconsistent. 13. Given the pair of statements: C L and L C • •
7. [(X A) • (B Y)] [(B Y) • (A X)] a. True. b. 8. In problem 7, the main operator is a: a. Wedge. b. c. Dot. d. Horseshoe. Section 3. Use ordinary truth tables to answer problems 9-15 (12 @ 3 points = 36 points): 9. Given the statement: (N K) (K N) This statement is: a. Contingent. b. Inconsistent. c. Tautologous. d. Self-contradictory. 10. Given the statement: (G Q) (Q • G) This statement is: a. Self-contradictory. b. Tautologous. c. Contingent. d. Logically equivalent. 11. the statement: [ H (E • D)] [(H • E) (H • D)] This statement is: a. Tautologous. b. Valid. c. Contingent. d. Self-contradictory. 12. the pair of statements: (S Q) and Q • S These statements are: a. Logically equivalent. b. Valid. c. Contradictory. d. Inconsistent. 13. Given the pair of statements: C • L and L • C
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