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# Animals with a certain behavioral disorder have unusually

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Animals with a certain behavioral disorder have unusually [#permalink]

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16 Nov 2006, 04:45
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5. Animals with a certain behavioral disorder have unusually high level of aluminum in their brain tissue. Since a silicon-based compound binds to aluminum and prevents it from affecting the brain tissue. Animals can be cured of the disorder by being treated with the compound.
The argument is based on which one of the following assumptions?
(A) Animals with the disorder have unusually high but invariable levels of aluminum in their brain tissue.
(B) Aluminum is the cause of the disorder rather than merely an effect of it.
(C) Introducing the compound into the brain tissue has no side effects.
(D) The amount of the compound needed to neutralize the aluminum in an animalâ€™s brain tissue varies depending upon the species.
(E) Aluminum is never present in normal brain tissue.

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Re: CR on aluminum in their brain tissue! [#permalink]

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16 Nov 2006, 04:57
jyotsnasarabu wrote:
5. Animals with a certain behavioral disorder have unusually high level of aluminum in their brain tissue. Since a silicon-based compound binds to aluminum and prevents it from affecting the brain tissue. Animals can be cured of the disorder by being treated with the compound.
The argument is based on which one of the following assumptions?
(A) Animals with the disorder have unusually high but invariable levels of aluminum in their brain tissue.
(B) Aluminum is the cause of the disorder rather than merely an effect of it.

A trap. Irrespective of whether Aluminium is the cause of effect, we dont want that to affect the brain tissue. Hence, we are not concerned about Aluminium as a cause or effect when we are deciding about silicon usage.

(C) Introducing the compound into the brain tissue has no side effects.

My answer. If introducing silicon causes some other side effects, its introduction can't be justified.

(D) The amount of the compound needed to neutralize the aluminum in an animalâ€™s brain tissue varies depending upon the species.
(E) Aluminum is never present in normal brain tissue.

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Last edited by ak_idc on 16 Nov 2006, 06:42, edited 2 times in total.

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16 Nov 2006, 06:22
OA is B..................M baffled myself..............inspite of readin the argumnet so many times....................

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Re: CR on aluminum in their brain tissue! [#permalink]

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16 Nov 2006, 06:42
ak_idc wrote:
jyotsnasarabu wrote:
5. Animals with a certain behavioral disorder have unusually high level of aluminum in their brain tissue. Since a silicon-based compound binds to aluminum and prevents it from affecting the brain tissue. Animals can be cured of the disorder by being treated with the compound.
The argument is based on which one of the following assumptions?
(A) Animals with the disorder have unusually high but invariable levels of aluminum in their brain tissue.
(B) Aluminum is the cause of the disorder rather than merely an effect of it.

A trap. Irrespective of whether Aluminium is the cause of effect, we dont want that to affect the brain tissue. Hence, we are not concerned about Aluminium as a cause or effect when we are deciding about silicon usage.

(C) Introducing the compound into the brain tissue has no side effects.

My answer. If introducing silicon causes some other side effects, its introduction can't be justified.

(D) The amount of the compound needed to neutralize the aluminum in an animalâ€™s brain tissue varies depending upon the species.
(E) Aluminum is never present in normal brain tissue.

Hey, now I understand. I did not pay attention to the word "silicon based compound".

That means the compound is a derivative of silicon. Hence there is no scope of silicon causing side effects since, that is the cure. They must have thought about the side effects before introducing that as a medicine. Hence, side effect is out side the scope of the argument.

As they are not using silicon, but silicon based compound we can take B as the answer. The argument says "prevents it from affecting the brain tissue". That means Aluminum is affecting the brain tissue, and there is no point in stopping it from affecting brain tissue unless Aluminum is affecting behavior subsequently. Aluminum might cause some other damage by affecting brain tissue (make them rust and make the individual unfit for gmat ) , but that is not covered in the argument, hence we can ignore that possibility...I guess.
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Last edited by ak_idc on 16 Nov 2006, 06:49, edited 1 time in total.

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16 Nov 2006, 06:48
gud notes.........n thanx for that bit of humor...............

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16 Nov 2006, 21:45
I was about to type a long explanation on causal reasoning errors but hey, who cares ... I'll pick B !
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17 Nov 2006, 01:41
Swagatalakshmi wrote:
I was about to type a long explanation on causal reasoning errors but hey, who cares ... I'll pick B !

we do..please share ur thoughts on causal reasoning...
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17 Nov 2006, 02:29
got b straight away

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Re: Animals with a certain behavioral disorder have unusually [#permalink]

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18 Apr 2013, 23:50
Cause and effect problem.
If aluminum is the effect of the disorder, a silicon-based compound cannot cure animals.
B is correct
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Re: Animals with a certain behavioral disorder have unusually [#permalink]

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12 Jul 2015, 08:37
Why is (E) Aluminum is never present in normal brain tissue. wrong answer for this question?

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Re: Animals with a certain behavioral disorder have unusually   [#permalink] 12 Jul 2015, 08:37
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