Taking "crocodiles" as Universe; x="hungry"; and y="amiable";
a. All hungry crocodiles are unamiable. b. No crocodiles are amiable when hungry. c. Some crocodiles, when not hungry, are amiable; but some are not. d. No crocodiles are amiable, and some are hungry. e. All crocodiles, when not hungry, are amiable; and all unamiable crocodiles are hungry. f. Some hungry crocodiles are amiable, and some that are not hungry are unamiable.
Symbols to be interpreted.
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(Lewis Carrol, The Game of Logic)