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Driving the steep road to the mountain-top Inca ruins of Machu Picchu

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Driving the steep road to the mountain-top Inca ruins of Machu Picchu [#permalink]

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Driving the steep road to the mountain-top Inca ruins of Machu Picchu is potentially dangerous and hiking there is difficult. Now the Peruvian government is installing acable car that will make access much easier, and hence result in a large increase in tourism. However, since the presence of large numbers of tourists tends to accelerate the deterioration of a site, installation of the cable car is certain to result in harm to the ruins.

Which of the following, if true, most seriously calls into question the argument?

(A) The daily number of tourists that are expected to take the cable car to Machu Piccu is smaller than the original resident population of Incas.

(B) The construction of the cable car terminal at Machu Picchu will require the use of potentially damaging heavy machinery at the site.

(C) Machu Picchu is already one of the most popular tourist sites in Peru.

(D) Natural weathering will continue to be a more significant cause of the deterioration of Machu Picchu than tourist traffic.

(E) The cable car will replace the tour buses whose large wheels and corrosive exhaust at present do significant damage to the site.

Originally posted by Lolaergasheva on 11 Feb 2011, 10:54.
Last edited by hazelnut on 13 Aug 2017, 06:29, edited 2 times in total.
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Re: Driving the steep road to the mountain-top Inca ruins of Machu Picchu [#permalink]

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New post 11 Feb 2011, 17:24
(E)

The passage implies cars->more tourists->more damage. If (E) is true, then cable cars may actually result in less damage.
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Re: Driving the steep road to the mountain-top Inca ruins of Machu Picchu [#permalink]

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New post 12 Feb 2011, 03:05
I think we have to answer - why installation of "cable cars" will NOT result in damage. E is strengthening the argument not weakening.
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Re: Driving the steep road to the mountain-top Inca ruins of Machu Picchu [#permalink]

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gmat1220 wrote:
I think we have to answer - why installation of "cable cars" will NOT result in damage. E is strengthening the argument not weakening.


Conclusion: Installation of the cable car is certain to result in harm to the ruins.
We are trying to weaken this conclusion.

E says: that the cable care will replace buses, which do damage now.

With their large wheels - cable car uses rails, so the road will not be damaged any more.
and corrosive exhaust - cable car runs on electricity, so no exhaust.

Furthermore, there won't be more tourists, only the means of transportation will be changed.

E weakens the argument and shows, that cable car will not result in harm to the ruins.
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Re: Driving the steep road to the mountain-top Inca ruins of Machu Picchu [#permalink]

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New post 12 Feb 2011, 20:26
E - weakens by supporting the conclusion.

tip - for weakening questions look for logical gap. don't destroy the conclusion.
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Re: Driving the steep road to the mountain-top Inca ruins of Machu Picchu [#permalink]

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New post 12 Feb 2011, 21:22
Correct me. E is answering why the author thinks tour buses WILL destroy the site. Are you answering why cable car will NOT destroy the site. I don't think so. Furthermore the arg is dependent on the number of tourists visiting the place. Reread the stimulus - "cable car .... access much ..... increase in tourism... tends to accelerate the deterioration of a site". How can E be the answer?

E.g If the defense attorney is alluding that X is better killer than Y - does that precludes Y from assisting in the crime? Same here. Hence choice E does not hold water. It has to answer the question "why" cable car will NOT destroy the site. And premise should verify that cable cars are technologically advanced. I don't see the support.
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Re: Driving the steep road to the mountain-top Inca ruins of Machu Picchu [#permalink]

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New post 16 Feb 2011, 02:32
gmat1220 wrote:
Correct me. E is answering why the author thinks tour buses WILL destroy the site. Are you answering why cable car will NOT destroy the site. I don't think so. Furthermore the arg is dependent on the number of tourists visiting the place. Reread the stimulus - "cable car .... access much ..... increase in tourism... tends to accelerate the deterioration of a site". How can E be the answer?

E.g If the defense attorney is alluding that X is better killer than Y - does that precludes Y from assisting in the crime? Same here. Hence choice E does not hold water. It has to answer the question "why" cable car will NOT destroy the site. And premise should verify that cable cars are technologically advanced. I don't see the support.

gmat1220 what you are asking for is a "perfect answer" to the question(something that says cable is eco friendly or something). wat u are saying about X and Y is indeed true. however in the absence of an answer that completely precludes cable cars,we shud choose one that is closest. and E does that. by saying cable cars are better than buses, we can saying cable cars are a better choice for manchu picchu. Maybe not the best, but definitely a better choice. So the conclusion is weakened(though only slightly).
Hope this helps!!
by the way ppl, wat is the source of this CR?
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Re: Driving the steep road to the mountain-top Inca ruins of Machu Picchu [#permalink]

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New post 16 Feb 2011, 13:35
Hi Guys ,

Pls forgive me if I am wrong But

Concl :

since the presence of large numbers of tourists tends to accelerate the
deterioration of a site so this is causing the harm . The impact of the Cable car or Tourist Bus is immaterial isin't it.

TO weaken the premise :
We need to show How the reduced people will improve the site beauty or reduce deterioration
Or
Since Machu Pichu is already crowded ... no matter what is done like cable cars or buses , the deterioration will continue immaterial to the transportation methods

So I think C is the answer But I am open to a debate since I may be wrong.
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Re: Driving the steep road to the mountain-top Inca ruins of Machu Picchu [#permalink]

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Steveewonder48 wrote:
Hi Guys ,

Pls forgive me if I am wrong But

Concl :

since the presence of large numbers of tourists tends to accelerate the
deterioration of a site so this is causing the harm . The impact of the Cable car or Tourist Bus is immaterial isin't it.

TO weaken the premise :
We need to show How the reduced people will improve the site beauty or reduce deterioration
Or
Since Machu Pichu is already crowded ... no matter what is done like cable cars or buses , the deterioration will continue immaterial to the transportation methods

So I think C is the answer But I am open to a debate since I may be wrong.

You are wrong and forgiven :lol:
jus kidding....coming to your argument,
"since the presence..." is not the conclusion,the conclusion is the second part which says "cable cars are bad for Machu picchu". disagree? read the sentence you have written above as conclusion. what is the "this"?
that is the conclusion and the first part is the premise. not convinced? ask yourself what is a premise? and what is a conclusion?(since obviously u know these terms it is easy to define it). A premise supports the conclusion and a conclusion is something that the argument says is true because of the premise. now break down the sentence in question. "since the presence.." is saying the reason why "cable cars are bad for machu picchu". Now what is the conclusion?
secondly,you almost never weaken the premise. It is the conclusion that you should attack, remember in every argument gmat will try invalidate the conclusion(main conclusion or sub conclusion) because an argument will have only one conclusion but many premises, it is easier to contradict that conclusion than to contradict several premises.

Hope this helps!!
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Re: Driving the steep road to the mountain-top Inca ruins of Machu Picchu [#permalink]

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New post 17 Feb 2011, 13:29
E. Because option E tells that the car is replacing the bus. As the car replacing bus, so the arguement is faulty.
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Re: Driving the steep road to the mountain-top Inca ruins of Machu Picchu [#permalink]

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New post 17 Feb 2011, 14:38
Superb Explanation !!!!!


I have to accept I am wrong !!

Definition of premise and Concl is real good !

U rock
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Re: Driving the steep road to the mountain-top Inca ruins of Machu Picchu [#permalink]

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New post 17 Feb 2011, 14:49
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glad to help!! :-D
perhaps one day you might return the favor when i am stuck!!
till then i'll be content if you give me a kudos by pressing +1 kudos under my display name. :wink:
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Re: Driving the steep road to the mountain-top Inca ruins of Machu Picchu [#permalink]

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New post 22 Apr 2014, 03:02
Option E.
If the cable cars will replace something already more damaging to the MP site,then the argument that cable cars will lead to deterioration is weakened.

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Re: Driving the steep road to the mountain-top Inca ruins of Machu Picchu [#permalink]

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New post 17 Mar 2015, 19:55
Explanation for choice D

Type: Weaken

Conclusion: installation of the cable => harm to the ruins

Assumption: installation of the cable is more harmful than current transportation used to get to the ruin.

Weaken the assumption: thr traditional way to get to the ruin is more harmful to the hostorical site
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Re: Driving the steep road to the mountain-top Inca ruins of Machu Picchu [#permalink]

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New post 06 Jul 2016, 03:15
I think key to answer this question "accelerate the deterioration of a site,"

What if X slow downs the deterioration of a site
Assumption :- X will not slow down the deterioration of a site
E clearly says the same.

Another way to see the problem is
X will lead to Y
Presenting another reason z will lead to Y , will not weaken the X as a reason.
in such cases we have check even X will be implemented , will it affect chances of Y
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Re: Driving the steep road to the mountain-top Inca ruins of Machu Picchu [#permalink]

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Lolaergasheva wrote:
Driving the steep road to the mountain-top Inca ruins of Machu Picchu is potentially dangerous and hiking there is difficult. Now the Peruvian government is installing a
cable car that will make access much easier, and hence result in a large increase in tourism. However, since the presence of large numbers of tourists tends to accelerate the
deterioration of a site, installation of the cable car is certain to result in harm to the ruins.

Which of the following, if true, most seriously calls into question the argument?
A. The daily number of tourists that are expected to take the cable car to Machu Piccu is smaller than the original resident population of Incas.
B. The construction of the cable car terminal at Machu Picchu will require the use of potentially damaging heavy machinery at the site.
C. Machu Picchu is already one of the most popular tourist sites in Peru.
D. Natural weathering will continue to be a more significant cause of the deterioration of Machu Picchu than tourist traffic.
E. The cable car will replace the tour buses whose large wheels and corrosive exhaust at present do significant damage to the site.


To weaken the conclusion, we have to look for an option that states that installation of cable car will not result in deterioration.

A. The daily number of tourists that are expected to take the cable car to Machu Piccu is smaller than the original resident population of Incas. We don't know how many tourists will cause the destruction of site.

B. The construction of the cable car terminal at Machu Picchu will require the use of potentially damaging heavy machinery at the site. It supports the conclusion.

C. Machu Picchu is already one of the most popular tourist sites in Peru. We are looking for an option that addresses damage to the site.

D. Natural weathering will continue to be a more significant cause of the deterioration of Machu Picchu than tourist traffic. we want to knoe if cable car will cause more destruction.

E. The cable car will replace the tour buses whose large wheels and corrosive exhaust at present do significant damage to the site. This means cable cars will infact be less damaging to the site. Correct answer
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Re: Driving the steep road to the mountain-top Inca ruins of Machu Picchu [#permalink]

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New post 30 Jan 2018, 19:08
nhattruong1302 wrote:
Explanation for choice D

Type: Weaken

Conclusion: installation of the cable => harm to the ruins

Assumption: installation of the cable is more harmful than current transportation used to get to the ruin.

Weaken the assumption: thr traditional way to get to the ruin is more harmful to the hostorical site



It appears your explanation is actually suited to E. Natural deterioration will happen anyway, so it is irrelevant to the argument about cable cars and more tourist traffic causing damage
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Re: Driving the steep road to the mountain-top Inca ruins of Machu Picchu [#permalink]

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New post 21 Feb 2018, 07:10
But E does not says that buses do more damage than cable car
It only says that it does a significant damage
Are we supposed to assume it does more damage than cable car???
Experts plz help
Re: Driving the steep road to the mountain-top Inca ruins of Machu Picchu   [#permalink] 21 Feb 2018, 07:10
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