It is currently 25 Sep 2017, 08:22

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Brain scans of people exposed to certain neurotoxins reveal

Author Message
Director
Joined: 06 Jan 2008
Posts: 549

Kudos [?]: 518 [0], given: 2

Brain scans of people exposed to certain neurotoxins reveal [#permalink]

### Show Tags

18 Apr 2008, 10:30
00:00

Difficulty:

(N/A)

Question Stats:

100% (01:21) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

Brain scans of people exposed to certain neurotoxins reveal brain damage identical to that found in people suffering from Parkinson’s disease. This fact shows not only that these neurotoxins cause this type of brain damage, but also that the brain damage itself causes Parkinson’s disease. Thus brain scans can be used to determine who is likely to develop Parkinson’s disease.
The argument contains which one of the following reasoning errors?
(A) It fails to establish that other methods that can be used to diagnose Parkinson’s disease are less accurate than brain scans.
(B) It overestimates the importance of early diagnosis in determining appropriate treatments for people suffering from Parkinson’s disease.
(C) It mistakes a correlation between the type of brain damage described and Parkinson’s disease for a causal relation between the two.
(D) It assumes that people would want to know as early as possible whether they were likely to develop Parkinson’s disease.
(E) It neglects to specify how the information provided by brain scans could be used either in treating Parkinson’s disease or in monitoring the progression of the disease.

Kudos [?]: 518 [0], given: 2

Manager
Joined: 19 Aug 2007
Posts: 202

Kudos [?]: 106 [0], given: 0

### Show Tags

18 Apr 2008, 14:17
C, only because all the other answer choices do not sound like GMAT answers.

Kudos [?]: 106 [0], given: 0

CEO
Joined: 17 May 2007
Posts: 2950

Kudos [?]: 658 [0], given: 210

### Show Tags

18 Apr 2008, 19:28
Clearly C -
saravalli wrote:
Brain scans of people exposed to certain neurotoxins reveal brain damage identical to that found in people suffering from Parkinson’s disease. This fact shows not only that these neurotoxins cause this type of brain damage, but also that the brain damage itself causes Parkinson’s disease. Thus brain scans can be used to determine who is likely to develop Parkinson’s disease.
The argument contains which one of the following reasoning errors?
(A) It fails to establish that other methods that can be used to diagnose Parkinson’s disease are less accurate than brain scans.
(B) It overestimates the importance of early diagnosis in determining appropriate treatments for people suffering from Parkinson’s disease.
(C) It mistakes a correlation between the type of brain damage described and Parkinson’s disease for a causal relation between the two.
(D) It assumes that people would want to know as early as possible whether they were likely to develop Parkinson’s disease.
(E) It neglects to specify how the information provided by brain scans could be used either in treating Parkinson’s disease or in monitoring the progression of the disease.

Kudos [?]: 658 [0], given: 210

Director
Joined: 06 Jan 2008
Posts: 549

Kudos [?]: 518 [0], given: 2

### Show Tags

22 Apr 2008, 13:32
guys OA is given as B in CR1000 doc.

Kudos [?]: 518 [0], given: 2

CEO
Joined: 17 May 2007
Posts: 2950

Kudos [?]: 658 [0], given: 210

### Show Tags

22 Apr 2008, 23:38
Yea but I'd appeal to common sense and say that the OA in this case may be incorrect. What do other clubbers think here ?

Kudos [?]: 658 [0], given: 210

Director
Joined: 05 Jan 2008
Posts: 687

Kudos [?]: 582 [0], given: 0

### Show Tags

23 Apr 2008, 02:01
It is a clear C guys.

I don't see B even as a contender.
_________________

Persistence+Patience+Persistence+Patience=G...O...A...L

Kudos [?]: 582 [0], given: 0

Senior Manager
Joined: 16 Aug 2004
Posts: 320

Kudos [?]: 52 [0], given: 0

Location: India

### Show Tags

23 Apr 2008, 05:07
Same here, C is a clear winner!! Maybe the gurus can help with more explanations!!

Kudos [?]: 52 [0], given: 0

Senior Manager
Joined: 29 Jan 2007
Posts: 441

Kudos [?]: 67 [0], given: 0

Location: Earth

### Show Tags

23 Apr 2008, 10:21
I agree with C

Kudos [?]: 67 [0], given: 0

SVP
Joined: 08 Nov 2006
Posts: 1553

Kudos [?]: 202 [0], given: 1

Location: Ann Arbor
Schools: Ross '10

### Show Tags

23 Apr 2008, 10:41
kyatin, thanks for the confidence.

I agree with all of you folks here. C is definitely the right answer.

The argument says that people affected by neurotoxins have the same type of brain damage suffered by people with parkinsons disease. In other words, 2 isolated events (neurotoxins and parkinsons disease) are assumed to be cause and effect mainly because of a common sympton(correlation), in this case brain damage. What if there are people with this type of brain damage who dont have parkinsons? So, there is some room that this conclusion could be false.

In other words,

All parkinsons -> Brain Damage

but, we dont know that

All brain damamge -> Parkinsons

The argument therefore assumes a correlation for a cause and effect. Thus, the answer is C. I would ignore the answer OA B.
_________________

My Profile/GMAT/MBA Story
http://www.gmatclub.com/forum/111-t59345

GMAT Club Premium Membership - big benefits and savings

Kudos [?]: 202 [0], given: 1

Senior Manager
Joined: 29 Jan 2007
Posts: 441

Kudos [?]: 67 [0], given: 0

Location: Earth

### Show Tags

23 Apr 2008, 10:52

Thanks as always.

I think we all shoudd create one sticky to list all disputed answers from 1000CR,SC etc..unless its already there.

Kudos [?]: 67 [0], given: 0

SVP
Joined: 16 Jul 2009
Posts: 1508

Kudos [?]: 1404 [0], given: 2

Schools: CBS
WE 1: 4 years (Consulting)

### Show Tags

24 May 2010, 14:28
Im also with C.
B talks about treatments and that´s out of scope, dont u think?
Could any CR guru clarify?
Thanks.
_________________

The sky is the limit
800 is the limit

GMAT Club Premium Membership - big benefits and savings

Kudos [?]: 1404 [0], given: 2

VP
Joined: 17 Feb 2010
Posts: 1480

Kudos [?]: 734 [0], given: 6

### Show Tags

26 May 2010, 12:46
It is a straight C.

Kudos [?]: 734 [0], given: 6

Manager
Joined: 25 May 2010
Posts: 136

Kudos [?]: 829 [0], given: 0

### Show Tags

27 May 2010, 01:33
Yes, the answer must be C:

A general note on weakening questions:

Weakening questions must weaken the conclusion, which, in this case, is that scans can determine the likelihood of developing Parkinson's... The correct answer affects the truth of this sentence and only this sentence. Thus, what people want, whether other scans work, treatment options etc. are irrelevant to the conclusion.
_________________

Sarai
Email me at saraiyaseen@gmail.com

If this helped, kindly give Kudos!

Kudos [?]: 829 [0], given: 0

Manager
Joined: 19 Feb 2009
Posts: 54

Kudos [?]: 128 [0], given: 8

### Show Tags

27 May 2010, 11:37
C it is!!

i agree with all the reasoning given above
_________________

Working without expecting fruit helps in mastering the art of doing fault-free action !

Kudos [?]: 128 [0], given: 8

Joined: 19 Feb 2010
Posts: 391

Kudos [?]: 193 [0], given: 76

### Show Tags

28 May 2010, 13:14
Can a moderator merge this thread with this one?

cr-brain-scans-62193.html#p730917

Kudos [?]: 193 [0], given: 76

Re: CR-neurotoxins   [#permalink] 28 May 2010, 13:14
Display posts from previous: Sort by

# Brain scans of people exposed to certain neurotoxins reveal

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.