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题库 / GMATLA-CR-16
For most people, the left half of the brain controls linguistic capabilities, but some people have their language centers in the right half. When a language center of the brains is damaged, for example, by a stroke, linguistic capabilities are impaired in some way. Therefore, people who have suffered a serious stroke on the left side of the brain without suffering any such impairment must have their language centers in the right half.
Which of the following is an assumption on which the reasoning in the argument above depends?
No part of a person's brain that is damaged by a stroke never recovers
Impairment of linguistic capabilities does not occur in people who have not suffered any damage to any language center of the brain.
Strokes tend to impair linguistic capabilities more severely than does any other cause of damage to language centers in the brain.
If there are language centers on the left side of the brain, any serious stroke affecting that side of the brain damages at least one of them.
It is impossible to determine which side of the brain contains a person's language centers if the person has not suffered damage to either side of the brain
当语言中枢受到伤害，语言能力因此被损害。
所以任何左脑遭到中风但是却没有影响语言能力的人，一定是因为这些人的语言中枢是在右半脑的。问assume？
choice a, 受到中风损伤的大脑中，没有一个部分永远不会恢复。irrelevant
choice b, 语言能力伤害不会发生在那些没有遭受语言中枢被破坏的人身上。out of scope~arugument讨论对象限定在遭受语言中枢伤害的人
choice d, 如果语言中枢存在左半脑，任何可以影响到大脑的中风至少损害其中的一个半球。correct，避免出现左半脑中风，但是左半脑的语言中枢没有遭受影响的情况
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