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Researchers have noticed that people whose blood shows

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 [#permalink] New post 10 Oct 2006, 17:31
The OA is C. I guess the deal for ppl who selected A is "Don't think too much" :-), and i happen to fall into that bucket.
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 [#permalink] New post 10 Oct 2006, 17:43
Straight C even though a lot of people have answered before me.

Reason: Laryngeal polyps prevent calcium absorption. So, low calcium levels are an effect of laryngeal polyps, rather than a cause.
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 [#permalink] New post 10 Oct 2006, 18:31
Just a side note why A (or D, for that matter) should not be the correct answer. In the stem dairy and fresh vegetables are mentioned. A only addresses dairy and D only addresses vegi. Therefore these two options are very unlikely to be the correct answer.
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 [#permalink] New post 10 Oct 2006, 22:26
Mailtheguru, can you please give the source of this CR.
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 [#permalink] New post 11 Oct 2006, 06:33
karlfurt wrote:
Mailtheguru, can you please give the source of this CR.


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MGMAT CR [#permalink] New post 18 Jun 2011, 21:19
Is this a flaw or a weaken question? How to identify this? Whats the main difference between the two ? and their approaches? How to use elimination to solve this? Please provide detailed explanation.

Researchers have noticed that people whose blood shows abnormally low levels of calcium usually have laryngeal polyps, which can permanently damage vocal cords and result in partial or even total loss of voice. In order to reduce the risk of polyps, the researchers recommend a diet high in calcium-rich foods such as dairy and green, leafy vegetables.

Which of the following, if true, most strongly suggests that following the researchers' recommendation would NOT be effective?

a)Dairy contains compounds that are difficult for many people to digest.

b)Laryngeal polyps sometimes disappear without treatment.

c)Laryngeal polyps cause a change in body chemistry that blocks the absorption of calcium.

d)Fresh vegetables are not always available in all seasons.

e)Low levels of calcium can sometimes be remedied with vitamin pills.

Last edited by siddhans on 19 Jun 2011, 13:26, edited 1 time in total.
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Re: MGMAT CR [#permalink] New post 19 Jun 2011, 17:36
C declares that poly causes low calcium and weakening. C is typical causal weakener. if argument said that X creates Y, weakener can say Y creates X.
B a weakener of the type no x but y still exist.

D is correct.

the book CRITICAL REASONING BIBLE is wonderful for this causal relation.

EXCEPT question required you to read well but contains no trick answer choice and so never be 700 level question.
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Re: MGMAT CR [#permalink] New post 19 Jun 2011, 20:35
+1 C
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Re: MGMAT CR [#permalink] New post 21 Jun 2011, 00:48
im still confused between b,c,d. can someone clearly explain which one is the right answer and why..
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Re: MGMAT CR [#permalink] New post 21 Jun 2011, 03:43
OA pls sidhans
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Re: MGMAT CR [#permalink] New post 21 Jun 2011, 05:49
C.

If calcium absorption is blocked, it's not going to matter if a person eats a food rich in calcium.
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Re: MGMAT CR [#permalink] New post 05 Aug 2011, 03:52
Expert's post
thangvietnam wrote:
C declares that poly causes low calcium and weakening. C is typical causal weakener. if argument said that X creates Y, weakener can say Y creates X.
B a weakener of the type no x but y still exist.

D is correct.

the book CRITICAL REASONING BIBLE is wonderful for this causal relation.

EXCEPT question required you to read well but contains no trick answer choice and so never be 700 level question.

I agree for D
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Re: MGMAT CR [#permalink] New post 05 Aug 2011, 05:01
siddhans wrote:
Is this a flaw or a weaken question? How to identify this? Whats the main difference between the two ? and their approaches? How to use elimination to solve this? Please provide detailed explanation.

Researchers have noticed that people whose blood shows abnormally low levels of calcium usually have laryngeal polyps, which can permanently damage vocal cords and result in partial or even total loss of voice. In order to reduce the risk of polyps, the researchers recommend a diet high in calcium-rich foods such as dairy and green, leafy vegetables.

Which of the following, if true, most strongly suggests that following the researchers' recommendation would NOT be effective?

a)Dairy contains compounds that are difficult for many people to digest.

b)Laryngeal polyps sometimes disappear without treatment.

c)Laryngeal polyps cause a change in body chemistry that blocks the absorption of calcium.

d)Fresh vegetables are not always available in all seasons.

e)Low levels of calcium can sometimes be remedied with vitamin pills.



"C" says it is the polyps that cause reduction of Calcium, not the other way round. Author assumes that the deficiency of calcium causes polyps and thus recommends a solution to increase Calcium in the diet.

This is one of the famous patterns suggested in CR bible for A causes B. If something is assumed to be a cause of an effect, a weakener would be a statement that just proves the reverse that B causes A.

Ans: "C"
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Re: MGMAT CR [#permalink] New post 05 Aug 2011, 12:08
Another way to perceive it is as follows:
We have a conclusion, In order to reduce the risk of polyps, the researchers recommend a diet high in calcium-rich foods such as dairy and green, leafy vegetables.
The author has concluded the above result, and in doing so makes a tacit assumption that a diet high in calcium will increase the abnormal low level of calcium in the blood.
However, he states a relation in the stimulus: low calcium -> laryngeal polyp -> other damages, before arriving at his conclusion.
Now consider the assumption as an indispensable pillar for the argument. In other words, the whole argument will fall apart if the assumption is deemed to be false. Hence to weaken the argument, or the recommendation here, all you need to do is attack the assumption, and you are done.

(C), 'blocking the absorption of calcium', attacks the assumption such that a diet high in calcium will NOT increase the abnormal low level of calcium in the blood
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Re: MGMAT CR [#permalink] New post 05 Aug 2011, 21:14
+1 for C. What is the OA?

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Re: MGMAT CR [#permalink] New post 05 Aug 2011, 21:18
C.+1.
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Re: MGMAT CR [#permalink] New post 06 Aug 2011, 04:29
Ans. C

Quote:
Is this a flaw or a weaken question? How to identify this? Whats the main difference between the two ? and their approaches? How to use elimination to solve this? Please provide detailed explanation.


This is a weaken Q as it is asking us to find an answer with would make the researchers' recommendation ineffective or weaken it.

Weaken Q can be identified by words such as : weaken, undermine, question the validity, cast doubt, most calls to question (someone's opinion or the conclusion)

Solve Weaken Q by:
A) identify an alternate cause effect. if x -> y; identify that Z -> y
B) reverse the relations. e.g in the Q posted by you -- calcium causes l polyps, reverse it to -- l polyps is the cause for low calcium content
C) show that change may not occur when cause occurs.

Flaw Question:

Flaw questions ask test-takers to identify a logical flaw between the assumption and the conclusion.

one e.g of a flow Q is:
(from kaplan) city A reported 2500 violent crimes and city B reported 1000 violent crimes. hence city B has low crime rate than city A
Flaw in the above argument is that - the data is not comparable since the population of city A is 20 times greater than city B

btw, you could refer to whiplash's CR guide: cr-guide-100473.html

Thanks,

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Re: MGMAT CR [#permalink] New post 16 Sep 2011, 01:31
The conclusion of the argument states that low calcium diet causes polyps. The asumption here is polyps does not causes low level of calcium. to weaken the conclusion either assumption shold fail or given options should directly attack the conlusion. option C makes the unstated assumption fails. hence answer is C
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Re: MGMAT CR [#permalink] New post 16 Sep 2011, 14:32
I picked C....based on the argument, low levels of calcium is not the cause of laryngeal polyps, it might be a consequence of having laryngeal polyps
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Re: MGMAT CR [#permalink] New post 16 Sep 2011, 19:58
+1 for C.

Took me 1:40
Re: MGMAT CR   [#permalink] 16 Sep 2011, 19:58
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