19. No crocodiles are amiable when hungry. 20. Some crocodiles, when not hungry, are amiable; but some are not. 21. No crocodiles are amiable, and some are hungry. 22. All crocodiles, when not hungry, are amiable; and all unamiable crocodiles are hungry. 23. Some hungry crocodiles are amiable, and some that are not hungry are unamiable. [See pp. 63, 4] 5. Smaller Diagram. Symbols to be interpreted. __________ ----------- | | | | x | |--y--|--y'-| | x' | | | | ----------- __________ ------- ------- | | | | | | 1. |---|---| 2. |---|---| | 1 | | | | 0 | ------- ------- ------- ------- | | 1 | | | | 3. |---|---| 4. |---|---| | | 0 | | 0 | 0 | ------- ------- __________ Taking "houses" as Universe; x="built of brick"; and y="two-storied"; interpret ------- ------- | 0 | | | | | 5. |---|---| 6. |---|---| | 0 | | | - | ------- ---|--- ------- ------- | | 0 | | | | 7. |---|---| 8. |---|---| | | | | 0 | 1 | ------- ------- [See p. 65] Taking "boys" as Universe; x="fat"; and y="active"; interpret ------- ------- | 1 | 1 | | | 0 | 9. |---|---| 10. |---|---| | | | | | 1 | ------- ------- ------- ------- | 0 | 1 | | 1 | | 11. |---|---| 12. |---|---| | | 0 | | 0 | 1 | ------- ------- __________ Taking "cats" as Universe; x="green-eyed"; and y="good-tempered"; interpret ------- ------- | 0 | 0 | | | 1 | 13. |---|---| 14. |---|---| | | 0 | | 1 | | ------- ------- ------- ------- | 1 | | | 0 | 1 | 15. |---|---| 16. |---|---| | | 0 | | 1 | 0 | ------- ------- [See pp. 65, 6] 6. Larger Diagram. Propositions to be represented. __________