Mary is allergic to cats. Mary's friend, Sue, has a roommate who has cats. Whenever Mary visits Sue, Mary sneezes even before she enters Sue's house. Mary's sneezing persists even after Sue's roommate and his cats have moved out. After a while, Mary stops sneezing before she enters Sue's house. The point at which Mary's sneezing stopped is an example of .
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Mary is allergic to cats. Mary's friend, Sue, has a roommate who has cats. Whenever Mary visits Sue,...
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