“If A and B are known to be true, and X and Y are known to be false, but the truth values of P and Q are not known, of which of the following statements can you determine the truth value?”

*Note:* In actuality, one can determine the truth value of *all* of the problems for this section. This makes Copi’s wording of the above question rather curious.

- F 11. T
- T 12. T
- F 13. F
- T 14. T
- T 15. F
- F 16. T
- T 17. T
- T 18. F
- T 19. F
- T 20. T

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