Although there has been great scientific debate for decades : GMAT Critical Reasoning (CR)
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# Although there has been great scientific debate for decades

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14 Apr 2010, 01:41
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Although there has been great scientific debate for decades over global warming, most scientists now agree that human activity is causing the Earth’s temperature to rise. Though predictions vary, many global warming experts believe that average global temperatures will rise between three and eight degrees Fahrenheit during the next century. Such an increase would cause an alarming rise in sea levels, displacing millions of people by destroying major population centers along the world’s coastlines.

Which of the following is an assumption in support of the argument’s conclusion?

A. New technological developments in the next century will not divert rising seas from the world’s coastal cities.
B. Individuals will not become more aware of the steps they can take to reduce the emission of greenhouse gases.
C. Rising sea levels similarly affect all coastal population centers.
D. Some global warming experts predict a greater than eight degree Fahrenheit increase in global temperatures during the next century.
E. Human activity is the sole cause of increasing global temperatures.
[Reveal] Spoiler: OA

Last edited by sh00nya on 14 Apr 2010, 03:11, edited 1 time in total.
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14 Apr 2010, 02:53
sh00nya wrote:
Although there has been great scientific debate for decades over global warming, most scientists now agree that human activity is causing the Earth’s temperature to rise. Though predictions vary, many global warming experts believe that average global temperatures will rise between three and eight degrees Fahrenheit during the next century. Such an increase would cause an alarming rise in sea levels, displacing millions of people by destroying major population centers along the world’s coastlines.

Which of the following is an assumption in support of the argument’s conclusion?

A. New technological developments in the next century will not divert rising seas from the world’s coastal cities.--- I think this is the assumption on which conclusion ( i.e the coastlines cities will be destroyed due to global warming), so now we are assuming that tech development will not help in diverting seas from the coastal cities, even if the temp rises

B. Individuals will not become more aware of the steps they can take to reduce the emission of greenhouse gases. -- PAssage never mentions anything about tge green house gases

C. Rising sea levels similarly affect all coastal population centers. -- It doesnt matters whether it affects similarly or not, the cities will still be destroyed.

D. Some global warming experts predict a greater than eight degree Fahrenheit increase in global temperatures during the next century. -- Ok, but how does that matters, cities will be destroyed due to rising sea levels

E. Human activity is the sole cause of increasing global temperatures.-- Even if human activities are not teh sole cause, then also cities will be destroyed but this time may be due to some other reason

Whats the OA ?
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14 Apr 2010, 03:12
Edited the post for OA

You are correct

The argument concludes that rising sea levels caused by global warming will destroy major coastal population centers and displace millions of people. Any assumption in support of this conclusion would have to corroborate that these events will definitively take place.
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22 Apr 2010, 11:10
I thought that A is out of scope. In assumption questions we should use just given info, isn't it?
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22 Apr 2010, 13:40
fruit wrote:
I thought that A is out of scope. In assumption questions we should use just given info, isn't it?

Yes, you should only use information given in the passage. But, the assumption given in the answer choice is the information additional to what has already been given in the passage. And you have to use this external information as an assumption to draw the conclusion.

I also made the mistake in this question. I chose B in the first place. It cannot be B since it does not say in the passage that Green House Gases are the main contributors to the temperature rise. I used external information and the answer I got was wrong.
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10 Nov 2011, 06:39
I think (A) is correct.

Because conclusion is rise in temperature > rise in sea level > destroy coastal line cities. If A is not an assumption and if negated, it means new technology can save the coastal line cities in the next century.
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13 Nov 2011, 08:31
This sentence I saw A is the assumption, but it is not strong enough comparably with other questions.

I also confuse with B, but after negate. In (B), when negate, meaning that the awareness of people did not make the consequence become less serious.
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13 Nov 2011, 08:37
Hey,

Option B is out of scope. Here they don't talk about the emission of green house gases.
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13 Nov 2011, 08:53
Nope. I don't think B out of scope. In assumption, we should not consider answer choice out of scope. Do you feel A relate to the emission of oil? No, it is not related but it is the NECESSARY info.
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13 Nov 2011, 09:01
I think the argument revolves around the effect of global warming. It talks more about the impact of global warming and the consequences. So we must restrict our scope within that frame.
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13 Nov 2011, 18:10
How you can determine which is out of scope, between A and B. These two choices are quite relevant, although I agree that A is the right choice. B talk about the greenhouse gases, this is the consequence of globalwarming, right? I definitely confirmed this is not out of scope.
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13 Nov 2011, 23:56
+1 for A.

An Assumption must be closely tied to the conclusion. According to the argument :
Premise:Temp will rise between 3-8 degrees.
Conclusion: Coastal population will have to be displaced.

A bridges the gap between Premise and Conclusion by acting as defender of the conclusion.

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16 Nov 2011, 20:20
A
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08 Dec 2011, 07:26
tuanquang269 wrote:
How you can determine which is out of scope, between A and B. These two choices are quite relevant, although I agree that A is the right choice. B talk about the greenhouse gases, this is the consequence of globalwarming, right? I definitely confirmed this is not out of scope.

B introduces greenhouse gases into the picture. They are not mentioned in the argument. In an assumption question, we are not required to bring in outside knowledge (the relation between greenhouse gases and global warming). That is why B is out of scope.
Please correct me if I am mistaken.
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08 Dec 2011, 16:03
+1 for A as it weakens the argument by negation
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08 Dec 2011, 19:51
a
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08 Dec 2011, 21:31
i'm left only with A, after selecting out all the other options.
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08 Dec 2011, 22:01
A when negated will totally disprove the conclusion.
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08 Dec 2011, 22:08
Conclusion: rising temperatures will cause rise in sea levels, displacing millions of people
A - Defender. When negated, ie, If there were technological developments that would prevent all the said catastrophic effects, then conclusion falls apart.
B - Irrelevant
C - Irrelevant to conclusion
D - Irrelevant
E - strong wording, irrelevant
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12 Dec 2011, 03:35
Can anyone justify why not E?
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Re: Although there has been great scientific debate for decades   [#permalink] 12 Dec 2011, 03:35

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