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The Ergonomic Society conducted a study that indicated that

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The Ergonomic Society conducted a study that indicated that [#permalink] New post 08 Dec 2012, 12:45
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The Ergonomic Society conducted a study that indicated that many people develop severe back problems during adulthood, and that virtually all such people who received chiropractic treatment showed great improvement. Therefore, in order to minimize the proportion of the population that suffers from back pain, the Ergonomic Society recommended that chiropractic treatment be directed toward those adults who suffer from severe back problems.

Which of the following is an assumption on which the argument depends?
Any person who receives chiropractic treatment for back pain may also benefit from other forms of treatment.
Large insurance carriers cover chiropractic care for back problems to a lesser degree than they do other medical treatments.
Individuals who receive chiropractic or other treatment prior to developing severe back problems are not less likely to develop back pain than those who do not.
Chiropractic treatment is more effective in treating severe back problems when utilized over a long period of time, as opposed to sporadically.
Severe back pain and other problems often cause individuals to miss workdays.

In the above answer choices, can someone apply Logical Negation to choice (C), which is the answer to the question.
My question is to know in which part of the sentence we need to apply the logical negation. In answer choice (C), we can apply logical negation at 3 places. So can someone explain where to apply.

Individuals who DO/DON'T receive chiropractic or other treatment prior to developing severe back problems are LESS LIKELY not less likely to develop back pain than those who do DOES not.

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Re: Logical Negation Technique - Assumption Question [#permalink] New post 08 Dec 2012, 13:05
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Hi Krackgmat,

Let me see if I can help..

Individuals who receive chiropractic or other treatment prior to developing severe back problems are not less likely to develop back pain than those who do not.


Is answer C. It's tricky, because as you say there are lots of negatives to work out. So, before we go any further, we need to work out what it actually saying.

It is saying that people who get preventative chiropractic treatment will not fare better than people who do not receive preventative treatment.

Re phrased like that the key 'negation' is clearer (highlighted above).

And it also makes it clear that this is an assumption. Because if we put all our $$ into treating people with back problems we need to know that we could not have spent the money better by treating all people before they get pain (preventative treatment).

James
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Former GMAT Pill student, now on staff. Used GMATPILL OG 12 and nothing else: 770 (48,48) & 6.0



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Re: Logical Negation Technique - Assumption Question   [#permalink] 08 Dec 2012, 13:05
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