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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
Option B:
Impairment of linguistic capabilities does not occur in people who have not suffered any damage to any language center of the brain.
Negated B:
Impairment of linguistic capabilities does occur in people who have not suffered any damage to any language center of the brain.
This does not affect our argument because it says that people who have NOT suffered any damage to any language center of brain are liable to getting their linguistic capabilities impaired. However, the question doesn't differentiate between people who have suffered any damage to language center and people who haven't. Additionally, this does not come close to explaining that people who have suffered a serious stroke on the left side of the brain without suffering such impairment must have their language centers in the right half!
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