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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]

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24 Nov 2006, 12:46
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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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24 Nov 2006, 13:37
C..
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24 Nov 2006, 14:44
Agree with C.

Just because the damage is identical does not mean that same type of damage caused Parkinson's in a person
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25 Nov 2006, 01:05
C 2
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25 Nov 2006, 17:33
C by POE
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26 Nov 2006, 00:16
OA=B
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03 Dec 2006, 17:37
Just saw this. Can someone explain why the answer is B, please? I still think B is wrong.
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03 Dec 2006, 21:46
Agree with C.

B is going beyond what is stated in the argument.
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15 Dec 2006, 17:49
bumping again. Anyone, why is the answer B? HongHu, would you like to answer this? would love your inputs.
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15 Dec 2006, 18:47
I feel C too..

Argument nowhere talks of treatment, which B is mentioning.. It seems to go beyond the scope too when talks of determining treatment..

Argument is simply if you can predict parkinson or not..

My worry is once you know OA, you can possibly create "some" reasoning to validate B.. something like "lie repeated many times becomes truth"..

May be given OA is wrong.. but at the sametime, I have been wrong too..
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16 Dec 2006, 20:22
I too agree with you all and disagree with the OA. The passage didn't talk about the importance of early diagnosis with respect to the appropriate treatment at all.
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16 Dec 2006, 20:22
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