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2007/12/28 19:37:27瀏覽1007|回應1|推薦1 | ||||||||||||||||||||||||||||||||||
理則學 練習15 範例 A-10
C-10. (E&F) ⊃G, H⊃E, ∴F⊃ (H⊃G)
D-1. If the patient had no fever, then malaria was not the cause of his illness. But malaria or food poisoning was the cause of his illness. The patient had no fever. Therefore, food poisoning must have caused his illness. (F, M, P) Let "F" mean "The patient had the fever ," let "M" mean "Malaria was the cause of his illness," let "P" mean "Food poisoning was the cause of his illness." 論證簡化如下: 1.–F⊃–M 2. MVP 3. –F ∴P
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( 知識學習|隨堂筆記 ) |