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Doubt in CR question given in Comprehensive CR guide

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Status: Re-take.. The OG just loves me too much.
Joined: 18 Jun 2012
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Location: India
GMAT 1: 600 Q44 V29
WE: Information Technology (Consulting)
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Doubt in CR question given in Comprehensive CR guide [#permalink] New post 13 Jul 2012, 06:33
This is a question from the Comprehensive Critical Reasoning Guide by gmatclub.

Robot satellites relay important communications and identify weather patterns. Because the satellites can be repaired only in orbit, astronauts are needed to repair them. Without repairs, the satellites would eventually malfunction. Therefore, space flights carrying astronauts must continue{Conclusion}.
Which of the following, if true, would most seriously weaken the argument above?

A. Satellites falling from orbit because of malfunctions burn up in the atmosphere – Irrelevant.

B. Although satellites are indispensable in the identification of weather patterns, weather forecasters also make some use of computer projections to identify weather patterns. This doesn’t provide a reason for not sending astronauts to space. Once again, out of scope.

C. The government, responding to public pressure, has decided to cut the budget for space flights and put more money into social welfare programs. Though this seems like a right answer, think about it. This is lots of irrelevant information, and doesn’t answer our question directly. Incorrect.

D. Repair of satellites requires heavy equipment, which adds to the amount of fuel needed to lift a spaceship carrying astronauts into orbit. Fuel? This is a shell game fallacy. Clearly shows a statement that could be true and is very attractive to the test taker, but irrelevant to what’s asked. Incorrect.

E. Technical obsolescence of robot satellites makes repairing them more costly and less practical than sending new, improved satellites into orbit. This makes sense. If repair cost > new satellite cost, why send astronauts to space to repair them? Just send new satellites. Hence this is correct.


I Would like to know why Option B is marked as "out of scope" while option E is marked correct.
the argument does talk about the robot satellites and whether pattern, but nothing about its costing.

Then why do we refute option B.

All help is appreciated.
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Re: Doubt in CR question given in Comprehensive CR guide [#permalink] New post 13 Jul 2012, 09:21
Expert's post
thebigr002 wrote:
This is a question from the Comprehensive Critical Reasoning Guide by gmatclub.

Robot satellites relay important communications and identify weather patterns. Because the satellites can be repaired only in orbit, astronauts are needed to repair them. Without repairs, the satellites would eventually malfunction. Therefore, space flights carrying astronauts must continue{Conclusion}.
Which of the following, if true, would most seriously weaken the argument above?

A. Satellites falling from orbit because of malfunctions burn up in the atmosphere – Irrelevant.

B. Although satellites are indispensable in the identification of weather patterns, weather forecasters also make some use of computer projections to identify weather patterns. This doesn’t provide a reason for not sending astronauts to space. Once again, out of scope.

C. The government, responding to public pressure, has decided to cut the budget for space flights and put more money into social welfare programs. Though this seems like a right answer, think about it. This is lots of irrelevant information, and doesn’t answer our question directly. Incorrect.

D. Repair of satellites requires heavy equipment, which adds to the amount of fuel needed to lift a spaceship carrying astronauts into orbit. Fuel? This is a shell game fallacy. Clearly shows a statement that could be true and is very attractive to the test taker, but irrelevant to what’s asked. Incorrect.

E. Technical obsolescence of robot satellites makes repairing them more costly and less practical than sending new, improved satellites into orbit. This makes sense. If repair cost > new satellite cost, why send astronauts to space to repair them? Just send new satellites. Hence this is correct.


I Would like to know why Option B is marked as "out of scope" while option E is marked correct.
the argument does talk about the robot satellites and whether pattern, but nothing about its costing.

Then why do we refute option B.

All help is appreciated.
When you're weakening a GMAT argument, you're seldom if ever directly addressing the evidence and the conclusion. After all, it would be too easy to dismiss every argument on the whole test as "The author is lying about his figures!" and then everyone would get an 800 :-D

Rather, the GMAT tests your ability to find missing links and unstated connections in the argument--and then, to strengthen or weaken them as appropriate.

Here, we are told the astronauts are the only way to repair important satellites. The conclusion is that manned spaceflight must continue. But this isn't a completely proper chain of logic; we have no evidence that repair is the best way to fix those satellites! The author is assuming that repairing satellites is wise and necessary. So, we look for an answer choice that states that repairing satellites is unwise.

(B) has nothing to do with that. But (E) matches what we predicted perfectly--even though astronauts are the only way to repair weather satellites, it doesn't matter, because it's economically wasteful to repair them at all! There is no longer a good reason to continue manned spaceflight, and so the author's argument is weakened and we have our solutions.

Hope this helps!
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Re: Doubt in CR question given in Comprehensive CR guide [#permalink] New post 13 Jul 2012, 10:35
Expert's post
I would like to add my 2 cents here. I completely agreeing with Mr. Eli that CR would be too easy if weakeners refuted the facts presented in the argument. I believe that you need to eliminate choice B, you comprehend and understand it. I have reproduced the choice below:

Quote:
Although satellites are indispensablein the identification of weather patterns, weather forecasters alsomake some use of computer projections to identify weather patterns


Notice the use of highlighted words: indispensable and also. By using "indispensable" this choice is saying that you need weather satellites. A weakener would actually say the opposite. Similarly, by using "also" the author is merely talking about some gadgetry that is needed "in addition to" satellites. Its like saying...

While tablet ,mode in computers are indispensable for the consumption of information on the go, PC modes are also required to stay productive on the road. - note we are not saying that the presence of PC mode obviates the need for tablet mode.


Let me know if this makes sense.
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Re: Doubt in CR question given in Comprehensive CR guide   [#permalink] 13 Jul 2012, 10:35
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