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Brain scans of people exposed to certain neurotoxins reveal

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Brain scans of people exposed to certain neurotoxins reveal [#permalink] New post 12 Dec 2004, 22:11
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A
B
C
D
E

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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.
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 [#permalink] New post 12 Dec 2004, 22:26
i'll go with answer choice (C):

there is nothing in the argument suggesting that these neurotoxins cause parkinsons. just because the brain damage cause by the toxins is the same as in parkinsons , that doesnt mean that these toxins cause parkinsons. there can be another cause. therefore answer - C.
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 [#permalink] New post 13 Dec 2004, 01:13
I think the choice C is obvious.

Thanks
Saurabh Malpani
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 [#permalink] New post 13 Dec 2004, 07:04
i was thinking about A as well, but i am sticking with my original answer - C. What is the OA???
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 [#permalink] New post 13 Dec 2004, 08:16
I also picked C, but C is not the OA provided. :(
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 [#permalink] New post 13 Dec 2004, 08:44
if C is not the correct answer, than it must be A. post the OA and explain.
  [#permalink] 13 Dec 2004, 08:44
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