求解关于逻辑的双重否定

kesenaierde · 发表于 2017-8-28 15:15:16

之前做题的时候喜欢用双重否定=肯定来做题判断，无奈遇到一道题，直接掉坑。
Among people who experience migraine headaches,some experience what doctors call "common" migraines, whereas othersexperience "classical" migraines. Siblings and spouses of common migraine sufferers are themselves twice as likely as the general populationto experience common migraines. Siblingsof classical migrainesufferers are four times more likely than the general population toexperience classical migraines, whereas spouses of classical migraine sufferersare no more likely than the general population to experience such headaches.

The information above provides the most supportfor which of the following hypotheses?

(A) Susceptibility to classical migraines is moredependent on hereditary factors than is susceptibility to common migraines.
(B) Unmarried adults are more likely to sufferfrom classical migraines than they are to suffer from common migraines.
(C) People who do not experience migraineheadaches are unlikely to have spouses who are migraine headache sufferers.
(D) Children of people who suffer from common migraines are not more likely than the general population to experience acommon migraine.
(E) Between one-quarter and one-half of thegeneral population suffer from either common or classical migraine headaches.
错选B，认为未婚更可能得classical migraine = 已婚不太可能得classical migraine错误，为什么不可以这么想让后选择B呢?

akiko427 · 发表于 2017-8-28 20:02:37

感觉和双重否定本身没多大关系虽然我觉得双重否定利用到主语很奇怪……。

你的推理是说已婚不太可能得到
可是argument的主体一直都是among people who experience migraine headaches 无论已婚未婚都要是得这个病的人
而你反过来的“已婚”是不在这个范围里的，因为不知道这些已婚的是不是得病的。

kesenaierde · 发表于 2017-8-29 22:29:30

akiko427 发表于 2017-8-28 20:02
感觉和双重否定本身没多大关系虽然我觉得双重否定利用到主语很奇怪……。

你的推理是说已婚不太可能得到 ...

同意！

求解关于逻辑的双重否定

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