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# For most people, the left half of the brain controls

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For most people, the left half of the brain controls [#permalink]

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26 Aug 2006, 20:57
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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 brain 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?

A. No part of a personâ€™s brain that is damaged by a stroke ever recovers.
B. Impairment of linguistic capabilities does not occur in people who have not suffered any damage to any language center of the brain.
C. Strokes tend to impair linguistic capabilities more severely than does any other cause of damage to language centers in the brain.
D. 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.
E. It is impossible to determine which side of the brain contains a personâ€™s language centers if the person has not suffered damage to either side of the brain.
[Reveal] Spoiler: OA
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Re: For most people, the left half of the brain controls [#permalink]

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26 Aug 2006, 22:55
jerrywu wrote:
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 brain 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?

A. No part of a personâ€™s brain that is damaged by a stroke ever recovers. ---> Extreme assumption NOPE
B. Impairment of linguistic capabilities does not occur in people who have not suffered any damage to any language center of the brain. ---> Another Extreme assumption NOPE
C. Strokes tend to impair linguistic capabilities more severely than does any other cause of damage to language centers in the brain. ---> Off topic NOPE
D. 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. Sounds like a correct assumption. Links the premise to the conclusion.
E. It is impossible to determine which side of the brain contains a personâ€™s language centers if the person has not suffered damage to either side of the brain. Very Extreme. NOPE

My guess is (D)

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26 Aug 2006, 22:59
Agreed with D
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19 Nov 2013, 04:49
2:58 D seems to be the only only assumption that fits the bill.
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Re: For most people, the left half of the brain controls [#permalink]

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16 May 2014, 06:40
Hi Chiranjeev,

As all the options except D,can be eliminated easily. i just want to test my negation skill here.

The negation of D would be "If there are language centers on the left side of the brain, any serious stroke affecting that
side of the brain damages NONE OF them.

Is it right ?

Thanks

Nitin
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Re: For most people, the left half of the brain controls [#permalink]

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15 Jul 2015, 11:15
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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For most people, the left half of the brain controls [#permalink]

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22 Aug 2015, 19:30
Nitinaka19 wrote:
Hi Chiranjeev,

As all the options except D,can be eliminated easily. i just want to test my negation skill here.

The negation of D would be "If there are language centers on the left side of the brain, any serious stroke affecting that
side of the brain damages NONE OF them.

Is it right ?

Thanks

Nitin

if none is damaged then having a stroke without such impairment and still not having language centers on right side is not possible acc. to question.

One more must be assumption is they cannot have language centers on both sides of the brain.

+1 kudos if this helps.
For most people, the left half of the brain controls   [#permalink] 22 Aug 2015, 19:30
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# For most people, the left half of the brain controls

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