• Award-winning private GMAT tutoring
Register now and save up to \$200

Available with Beat the GMAT members only code

• Magoosh
Study with Magoosh GMAT prep

Available with Beat the GMAT members only code

• 1 Hour Free
BEAT THE GMAT EXCLUSIVE

Available with Beat the GMAT members only code

• Free Trial & Practice Exam
BEAT THE GMAT EXCLUSIVE

Available with Beat the GMAT members only code

• 5-Day Free Trial
5-day free, full-access trial TTP Quant

Available with Beat the GMAT members only code

• Free Practice Test & Review
How would you score if you took the GMAT

Available with Beat the GMAT members only code

• 5 Day FREE Trial
Study Smarter, Not Harder

Available with Beat the GMAT members only code

• Get 300+ Practice Questions

Available with Beat the GMAT members only code

• Free Veritas GMAT Class
Experience Lesson 1 Live Free

Available with Beat the GMAT members only code

## Linguistic capabilities and the brain

tagged by:

This topic has 2 expert replies and 12 member replies
pakaskwa Master | Next Rank: 500 Posts
Joined
04 Mar 2009
Posted:
107 messages
Thanked:
9 times
Test Date:
Apr 18, 2009
Target GMAT Score:
750
GMAT Score:
750

#### Linguistic capabilities and the brain

Mon Apr 06, 2009 3:31 pm
Elapsed Time: 00:00
• Lap #[LAPCOUNT] ([LAPTIME])
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 person'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 person's language centers if the person has not suffered damage to either side of the brain.

Need free GMAT or MBA advice from an expert? Register for Beat The GMAT now and post your question in these forums!
gmat740 MBA Student
Joined
16 Aug 2008
Posted:
1194 messages
Followed by:
15 members
Thanked:
71 times
GMAT Score:
710
Mon Apr 06, 2009 9:09 pm
Quote:
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.
Negate this

serious stroke is not able to damage even one of the language centers

so, the language centers remain in the left side inspite of the stroke which happened to be on the left side.

so our conclusion that
Quote:
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.
conclusion is weakened

SO this is the correct answer[/quote]

delhiboy1979 Master | Next Rank: 500 Posts
Joined
11 Feb 2009
Posted:
239 messages
Mon Apr 06, 2009 11:07 pm
I had narrowed it to A and D. D does look the better option.

ketkoag Legendary Member
Joined
10 Apr 2008
Posted:
876 messages
Thanked:
13 times
Tue Apr 07, 2009 5:48 am
IMO : B coz in this option, a relation between linguistic capabilities and language centers is given and that is what required to fill the gap in the reasoning.

gmat740 MBA Student
Joined
16 Aug 2008
Posted:
1194 messages
Followed by:
15 members
Thanked:
71 times
GMAT Score:
710
Tue Apr 07, 2009 6:46 am
can we have the OA Please?

mjjking Master | Next Rank: 500 Posts
Joined
20 Jan 2007
Posted:
353 messages
Thanked:
7 times
GMAT Score:
720
Tue Apr 07, 2009 7:11 am
The OA is clearly D, because the assumption that must be true for the argument to hold is that ANY stroke will damage at least one language center in the brain. Then, if somebody suffers a stroke in the left side BUT his language abilities are unaffected he must have all of his language centers in the right part.

_________________
Beat The GMAT - 1st priority
Enter a top MBA program - 2nd priority
Loving my wife: MOST IMPORTANT OF ALL!

REAL THING 1 (AUG 2007): 680 (Q43, V40)
REAL THING 2 (APR 2009): 720 (Q47, V41)

pakaskwa Master | Next Rank: 500 Posts
Joined
04 Mar 2009
Posted:
107 messages
Thanked:
9 times
Test Date:
Apr 18, 2009
Target GMAT Score:
750
GMAT Score:
750
Tue Apr 07, 2009 11:50 am
The OA is E. It's clearly a wrong answer. The source of this question is from some online GMAT test prep. It's not very reliable. I think D is the only reasonable answer.

anshulseth Master | Next Rank: 500 Posts
Joined
16 Feb 2009
Posted:
145 messages
Followed by:
2 members
Thanked:
2 times
Target GMAT Score:
750
Thu Apr 09, 2009 12:51 am

Logic is to use transposition, as its a causation question.

If damage to lang center of brain implies loss of linguistic capabilities.

Then if linguistic capabilities are not impaired, then lang center of brain is not damaged.

Hence, B

_________________
Asset

hk MBA Student
Joined
28 Jan 2009
Posted:
533 messages
Followed by:
9 members
Thanked:
33 times
GMAT Score:
640
Thu Apr 09, 2009 7:12 am
I think the answer is E.

Here my take: The first sentence tells us that the Language center can be either on the left side or on the right side of the brain. The second tells us that if the language center is damaged, then the person looses the language capability. And then the author concludes that the way to find which side of the brain the language center is by analyzing if the damage done to left side does not affect the language skills then the guy has the language center in the other side. This argument is based on the theory that the language center can be on either side. Hence the author assumes that unless the guy has a stroke and damages one side, there is no way to tell which side of his brain houses the language centers!!! This E is the answer!!!.

Correct me if i'm wrong.

_________________

dendude Master | Next Rank: 500 Posts
Joined
30 May 2008
Posted:
160 messages
Thanked:
10 times
Test Date:
Soon...
Target GMAT Score:
740+
GMAT Score:
600
Thu Apr 09, 2009 9:36 am
hk wrote:
I think the answer is E.

Here my take: The first sentence tells us that the Language center can be either on the left side or on the right side of the brain. The second tells us that if the language center is damaged, then the person looses the language capability. And then the author concludes that the way to find which side of the brain the language center is by analyzing if the damage done to left side does not affect the language skills then the guy has the language center in the other side. This argument is based on the theory that the language center can be on either side. Hence the author assumes that unless the guy has a stroke and damages one side, there is no way to tell which side of his brain houses the language centers!!! This E is the answer!!!.

Correct me if i'm wrong.
No I dont think this reasoning is correct.
An assumption has to have a bearing on the conclusion. It cannot be a finding.
Yes the argument is based on the theory that the language center can be on either side but the conclusion does not assume that we need to determine which side houses the LC.
The conclusion states that the left side of the brain suffered a stroke and there was no impairment so the LC is on the right.
Clearly this conclusion assumes that if the LC had been on the left, the stroke would have damaged it and since there's no impairment thats why the LC has to be on the right.

jainrahul1985 Master | Next Rank: 500 Posts
Joined
17 Aug 2008
Posted:
228 messages
Thanked:
4 times
Thu Jun 02, 2011 6:38 am
Is the OA B . Experts request you to confirm . Please correct me if I am wrong

### GMAT/MBA Expert

kevincanspain GMAT Instructor
Joined
22 Mar 2007
Posted:
613 messages
Followed by:
63 members
Thanked:
171 times
GMAT Score:
790
Thu Jun 02, 2011 7:08 am
Whether impairment of language capabilities results only from damage to the language center of the brain is irrelevant. What we need to consider is the following:

Are you convinced that somebody who suffers a stroke on the left side of his brain and nevertheless does not experience any linguistic impairment must have his language centers on the other half?

Here's an analogy:

Burglars broke into Karen's house and made off with a lot of her antiques and electronic equipment, all of which were located on the ground floor. The burglars heard the police come and fled without going up to the second floor. Karen later reported that her jewels had not been removed from the house. Obviously, these jewels were located on the second floor.

_________________
Kevin Armstrong
GMAT Instructor
Gmatclasses

Thanked by: sahilmalhotra01
Free GMAT Practice Test under Proctored Conditions! - Find a practice test near you or live and online in Kaplan's Classroom Anywhere environment. Register today!

### GMAT/MBA Expert

GMATGuruNY GMAT Instructor
Joined
25 May 2010
Posted:
13356 messages
Followed by:
1779 members
Thanked:
12880 times
GMAT Score:
790
Thu Jun 02, 2011 7:46 am
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 person�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 person�s language centers if the person has not suffered damage to either side of the brain.
Learn to recognize the common flaws.

This argument exhibits a shift in language.
The premise is about a stroke.
The conclusion is about the language centers.

The argument assumes a connection between these two ideas: it assumes that a stroke must damage the language centers.

Answer choice D states this assumption:

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.

_________________
Mitch Hunt
GMAT Private Tutor
GMATGuruNY@gmail.com
If you find one of my posts helpful, please take a moment to click on the "Thank" icon.
Available for tutoring in NYC and long-distance.

Thanked by: mevicks, Anaira Mitch
Free GMAT Practice Test How can you improve your test score if you don't know your baseline score? Take a free online practice exam. Get started on achieving your dream score today! Sign up now.
tanviet Legendary Member
Joined
20 May 2008
Posted:
1404 messages
Followed by:
2 members
Thanked:
18 times
Wed Jun 08, 2011 8:33 pm
I agree D is correct

but why A is wrong?, please, help me out.

cans Legendary Member
Joined
04 Apr 2011
Posted:
1309 messages
Followed by:
122 members
Thanked:
310 times
Test Date:
13th Oct
Target GMAT Score:
750+
GMAT Score:
750
Wed Jun 08, 2011 9:57 pm
Assumption joins premise to the conclusion/reasoning.
And thus assumption strengthens the reasoning.
A) on the other hand weakens the argument.
IMO D

_________________
If my post helped you- let me know by pushing the thanks button

Contact me about long distance tutoring!
krazyjenius@gmail.com

Cans!!

### Best Conversation Starters

1 Vincen 180 topics
2 lheiannie07 61 topics
3 Roland2rule 54 topics
4 ardz24 44 topics
5 VJesus12 14 topics
See More Top Beat The GMAT Members...

### Most Active Experts

1 Brent@GMATPrepNow

GMAT Prep Now Teacher

155 posts
2 Rich.C@EMPOWERgma...

EMPOWERgmat

105 posts
3 GMATGuruNY

The Princeton Review Teacher

101 posts
4 Jay@ManhattanReview

Manhattan Review

82 posts
5 Matt@VeritasPrep

Veritas Prep

80 posts
See More Top Beat The GMAT Experts