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# V03-22

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Math Expert
Joined: 02 Sep 2009
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16 Sep 2014, 01:59
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35% (medium)

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73% (01:35) correct 27% (02:04) wrong based on 37 sessions

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Archaeologists should make greater use of satellite images in their search for Mayan ruins in the jungles of Guatemala. Though satellite photographs have proven unhelpful because of their inability to penetrate the dense tree canopy, infrared imaging translates heat signatures into distinct colors, making previously-undiscovered ruins visible.

The conclusion above is based on which of the following assumptions?

A. Archeologists in the field have not been able to discover many ruins because the jungle is impenetrable.
B. Archaeologists use both satellite technology and local folklore to theorize the location of ruins.
C. Archaeologists require special training in order to read maps produced by infrared imaging.
D. Satellite photography has not produced images of sufficient detail to locate ruins in the jungle.
E. Infrared imaging is helpful because the heat signature of ruin sites is different from the heat signature of the surrounding jungle.

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16 Sep 2014, 01:59
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Official Solution:

Archaeologists should make greater use of satellite images in their search for Mayan ruins in the jungles of Guatemala. Though satellite photographs have proven unhelpful because of their inability to penetrate the dense tree canopy, infrared imaging translates heat signatures into distinct colors, making previously-undiscovered ruins visible.

The conclusion above is based on which of the following assumptions?

A. Archeologists in the field have not been able to discover many ruins because the jungle is impenetrable.
B. Archaeologists use both satellite technology and local folklore to theorize the location of ruins.
C. Archaeologists require special training in order to read maps produced by infrared imaging.
D. Satellite photography has not produced images of sufficient detail to locate ruins in the jungle.
E. Infrared imaging is helpful because the heat signature of ruin sites is different from the heat signature of the surrounding jungle.

Situation:The author of the passage argues that archaeologists should use satellite infrared imaging to locate Mayan ruins.

Reasoning: Which of the following is the assumption underlying the author’s conclusion? The author first dismisses satellite photography because photographic images capture only the tops of the trees and not ruins that may lie beneath. Infrared imaging, however, penetrates the jungle and detects heat signatures on the ground, translating them into colors that can be mapped. The passage assumes that the ruins will have a distinctive heat signature, setting them apart from the surrounding jungle.
1. The passage states that the jungle is impenetrable to satellite photographs, not to archaeologists.
2. The passage does not mention the use of local folklore.
3. The passage does not mention a need for special training to read maps produced by infrared imaging.
4. The problem with satellite photography is not its lack of detail, but its inability to penetrate the dense tree canopy.
5. This option correctly identifies the assumption in the passage that infrared imaging will be successful because ruins and jungle have different, distinctive heat signatures.

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05 Jan 2016, 04:35
Hi Bunuel ,

As its an assumption question, so we need to find an answer which makes the conclusion STRONG.

Conclusion:- Archaeologists should make greater use of satellite images in their search for Mayan ruins in the jungles of Guatemala.

Archaeologist also have Infrared imaging technique, which translates heat signatures into distinct colors, making previously-undiscovered ruins visible.

But still conclusion states that Archaeologists should make greater use of satellite images

Paraphrasing this question-

Infrared imaging translates heat signatures into distinct colors, making previously-undiscovered ruins visible.
Satellite images have proven unhelpful because of their inability to penetrate the dense tree canopy.
GAP______________________________________________ GAP
Conclusion- Archaeologists should make greater use of satellite images in their search for Mayan ruins in the jungles of Guatemala.

So, we need to find a point which makes Infrared imaging less likely to be used "In search for Mayan ruins in the jungles of Guatemala"

Only 2 option talks about infrared imaging i.e C and E.

Scenario 1:

Infrared imaging translates heat signatures into distinct colors, making previously-undiscovered ruins visible.
Satellite images have proven unhelpful because of their inability to penetrate the dense tree canopy.
GAP____Archaeologists require special training in order to read maps produced by infrared imaging_________ GAP
Conclusion- Archaeologists should make greater use of satellite images in their search for Mayan ruins in the jungles of Guatemala.

Scenario 2:

Infrared imaging translates heat signatures into distinct colors, making previously-undiscovered ruins visible.
Satellite images have proven unhelpful because of their inability to penetrate the dense tree canopy.
GAP___Infrared imaging is helpful because the heat signature of ruin sites is different from the heat signature of the surrounding jungle_______ GAP
Conclusion- Archaeologists should make greater use of satellite images in their search for Mayan ruins in the jungles of Guatemala.

Scenario 1 makes more sense.
IMO- C should be the answer.

Can you please tell what's wrong in my reasoning...??

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Prakhar
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09 Jan 2016, 12:38
Hi chetan2u / daagh,

Can you help in solving my query on this question..?

Thanks and Regards,
Prakhar
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Thanks and Regards,
Prakhar
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Joined: 13 Sep 2014
Posts: 23
Concentration: Entrepreneurship, Strategy

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05 Sep 2016, 09:10
I think this is a high-quality question and the explanation isn't clear enough, please elaborate.
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05 Sep 2016, 09:34
AkashKashyap wrote:
I think this is a high-quality question and the explanation isn't clear enough, please elaborate.

Please mention your doubt specifically, so that we may discuss it properly.
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05 Sep 2016, 09:54
PrakharGMAT wrote:
Hi Bunuel ,

As its an assumption question, so we need to find an answer which makes the conclusion STRONG.

Conclusion:- Archaeologists should make greater use of satellite images in their search for Mayan ruins in the jungles of Guatemala.

Archaeologist also have Infrared imaging technique, which translates heat signatures into distinct colors, making previously-undiscovered ruins visible.

But still conclusion states that Archaeologists should make greater use of satellite images

Paraphrasing this question-

Infrared imaging translates heat signatures into distinct colors, making previously-undiscovered ruins visible.
Satellite images have proven unhelpful because of their inability to penetrate the dense tree canopy.
GAP______________________________________________ GAP
Conclusion- Archaeologists should make greater use of satellite images in their search for Mayan ruins in the jungles of Guatemala.

So, we need to find a point which makes Infrared imaging less likely to be used "In search for Mayan ruins in the jungles of Guatemala"

Only 2 option talks about infrared imaging i.e C and E.

Scenario 1:

Infrared imaging translates heat signatures into distinct colors, making previously-undiscovered ruins visible.
Satellite images have proven unhelpful because of their inability to penetrate the dense tree canopy.
GAP____Archaeologists require special training in order to read maps produced by infrared imaging_________ GAP
Conclusion- Archaeologists should make greater use of satellite images in their search for Mayan ruins in the jungles of Guatemala.

Scenario 2:

Infrared imaging translates heat signatures into distinct colors, making previously-undiscovered ruins visible.
Satellite images have proven unhelpful because of their inability to penetrate the dense tree canopy.
GAP___Infrared imaging is helpful because the heat signature of ruin sites is different from the heat signature of the surrounding jungle_______ GAP
Conclusion- Archaeologists should make greater use of satellite images in their search for Mayan ruins in the jungles of Guatemala.

Scenario 1 makes more sense.
IMO- C should be the answer.

Can you please tell what's wrong in my reasoning...??

Reading your post, it appears that you have a misunderstanding of the argument:

1. There are two types of images taken by satellite - type 1: photographs and type 2: infrared imaging.
2. Although photographs (type 1) are not very useful because of reason X, the infrared imaging (type 2) can be useful because of reason Y.
3. Conclusion: Though the type 1 imaging (photographs) is not useful, the archeologists should make use of satellite images - (since they could use the type 2 imaging (infrared) to their benefit).

The assumption is: The infrared imaging is able to generate a distinct image of the ruins (against whatever constraint).

Option E confirms that the infrared imaging CAN overcome a particular constraint and create distinguishable image. If the heat signature of ruins were NOT different from the surrounding jungle, the images would NOT be helpful. Thus, negating option E breaks down the argument. Option E is an assumption.

Option C: It may so be the case that the archeologists are already aware of the technique of reading maps created by infrared imaging - there may NOT be any requirement for further training whatsoever. Option C is not a necessary assumption.
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08 Apr 2019, 01:36
Where in the argument it states/makes obvious that the Satellite images=Infrared images and not the Satellite Photographs ?
Re: V03-22   [#permalink] 08 Apr 2019, 01:36
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# V03-22

Moderators: chetan2u, Bunuel