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# Brain scans of people exposed to certain neurotoxins reveal

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Director
Joined: 20 Apr 2005
Posts: 584

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

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27 May 2005, 12:25
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9. Brain scans of people exposed to certain neurotoxins reveal brain damage identical to that found in people suffering from Parkinsonâ€™s disease. This fact shows not only that these neurotoxins cause this type of brain damage, but also that the brain damage itself causes Parkinsonâ€™s disease. Thus brain scans can be used to determine who is likely to develop Parkinsonâ€™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 Parkinsonâ€™s disease are less accurate than brain scans.
(B) It overestimates the importance of early diagnosis in determining appropriate treatments for people suffering from Parkinsonâ€™s disease.
(C) It mistakes a correlation between the type of brain damage described and Parkinsonâ€™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 Parkinsonâ€™s disease.
(E) It neglects to specify how the information provided by brain scans could be used either in treating Parkinsonâ€™s disease or in monitoring the progression of the disease.

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Intern
Joined: 28 Mar 2005
Posts: 43

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27 May 2005, 12:42
I pick C

'This fact shows not only that these neurotoxins cause this type of brain damage, but also that the brain damage itself causes Parkinsonâ€™s disease.'

I don't see the correlation...

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Senior Manager
Joined: 07 Nov 2004
Posts: 452

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27 May 2005, 12:49
agree, C

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Senior Manager
Joined: 17 Apr 2005
Posts: 372

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Location: India

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28 May 2005, 06:05
DLMD wrote:
agree, C

I too vote for C

HMTG

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Manager
Joined: 18 Apr 2005
Posts: 90

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Location: Atlanta

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28 May 2005, 21:02
C looks tempting,let's see what the OA is.

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Senior Manager
Joined: 21 Mar 2004
Posts: 445

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Location: Cary,NC

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29 May 2005, 12:58
One more for C.
A. nothing is mentioned about accuracy
B. Overestimation - not talked about
C. Best answer. Brain damage is identical in both cases. But declaring it as a causal effect for P's disease is plain wrong.
D. wanting to know as early as possible - out of scope
E. out of scope
_________________

ash
________________________
I'm crossing the bridge.........

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Director
Joined: 20 Apr 2005
Posts: 584

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30 May 2005, 06:09
I too thought the answer was C, but the OA says B.

Wierd, huh ?

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Director
Joined: 18 Feb 2005
Posts: 666

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30 May 2005, 06:15
WinWinMBA wrote:
I too thought the answer was C, but the OA says B.

Wierd, huh ?

Do you any OE ?

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# Brain scans of people exposed to certain neurotoxins reveal

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