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Monarch butterflies spend the winter hibernating on trees in certain

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Monarch butterflies spend the winter hibernating on trees in certain  [#permalink]

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New post 19 Aug 2017, 07:29
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00:00
A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

63% (01:53) correct 37% (02:09) wrong based on 161 sessions

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Monarch butterflies spend the winter hibernating on trees in certain forests. Local environmental groups have organized tours of the forests in an effort to protect the butterflies’ habitat against woodcutters. Unfortunately, the tourists trample most of the small shrubs that are necessary to the survival of any monarch butterflies that fall of the trees. Therefore, the tour groups themselves are endangering the monarch butterfly population.

Which one of the following would it be most useful to know in evaluating the argument?

(A) the amount of forest land suitable for monarch butterfly hibernation that is not currently used by monarch butterflies for hibernation
(B) the amount of wood cut each year by woodcutters in forests used by monarch butterflies for hibernation
(C) the amount of plant life trampled by the tourists that is not necessary to the survival of monarch butterflies
(D) the proportion of the trees cut down by the woodcutters each year that are cut in the forests used by monarch butterflies for hibernation
(E) the proportion of hibernating monarch butterflies that fall of the trees

Source: LSAT

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Re: Monarch butterflies spend the winter hibernating on trees in certain  [#permalink]

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New post 19 Aug 2017, 07:59
1
On LSAT logical reasoning and GMAT critical reasoning, it is critical (pun intended!) that you pay close attention to any terms that shift between the presented grounds/evidence and the posited conclusion. In this case the "Monarch butterflies... hibernating on trees in certain forests" presented in the opening of the prompt subtly shifts to "monarch butterflies that fall of(f) the trees". By proactively identifying this slight shift in terms, it can be predicted that in order to evaluate the cogency of this argument it is imperative to learn whether "monarch butterflies... hibernating on trees in certain forests" = "monarch butterflies that fall of(f) the trees". This matches choice E.
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Monarch butterflies spend the winter hibernating on trees in certain  [#permalink]

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New post 19 Jan 2019, 03:17
Argument: butterflies hibernate on trees, environmentalists do tours of the forests in order to protect the butterflies’ habitat against woodcutters. But tourists trample butterflies that fall of the trees and thus endanger the butterflies themselves.

A Irrelevant to the evaluation of possible negative effects of the tours.
B Relevant to the negative effects of the woodcutters, but not to the tours.
C Irrelevant, because this has no effect on the survival of butterflies
D Same as B
E Correct. If we know this we can determine the extent of the negative consequences of the tours


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Monarch butterflies spend the winter hibernating on trees in certain   [#permalink] 19 Jan 2019, 03:17
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