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To reduce the danger to life and property posed by major earthquakes

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To reduce the danger to life and property posed by major earthquakes  [#permalink]

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New post Updated on: 27 Sep 2018, 20:36
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To reduce the danger to life and property posed by major earthquakes, scientists have been investigating several techniques for giving advance warning of dangerous earthquakes. Since catfish swim erratically before earthquakes, some investigators have proposed monitoring catfish to predict dangerous earthquakes.

Which of the following, if true, most seriously undermines the usefulness of the proposal?


(A) In Japan, which is subject to frequent earthquakes, the behavior of catfish has long been associated with earthquakes.

(B) Mechanical methods for detecting earthquakes have not proved effective.

(C) Tremors lead to the release of hydrogen sulfide gas into water, thereby causing various fish and shellfish to behave erratically.

(D) Careful construction can reduce the dangers posed by earthquakes.

(E) Even very slight, fleeting tremors cause catfish to swim erratically

Originally posted by rajatr on 18 Apr 2013, 05:24.
Last edited by Bunuel on 27 Sep 2018, 20:36, edited 1 time in total.
Renamed the topic and edited the question.
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Re: To reduce the danger to life and property posed by major earthquakes  [#permalink]

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New post 18 Apr 2013, 05:31
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To prevent damages caused by earthquakes, scientists will rely on catfish because they swim erratically before earthquakes.

Which of the following, if true, most seriously undermines the usefulness of the proposal?

We have to look for an answer that undermines the connection earthquake => movement of catfish.
E does just that:
(E) Even very slight, fleeting tremors cause catfish to swim erratically
The connection in undermined now

Initially I was quite sure of C, so I want to explain why I discarded it eventually:
(C) Tremors lead to the release of hydrogen sulfide gas into water, thereby causing various fish and shellfish to behave erratically.
The text talks about catfish and not about "various fish", we cannot say anything about catfish.
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Re: To reduce the danger to life and property posed by major earthquakes  [#permalink]

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New post 18 Apr 2013, 06:19
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well i think all the choices but E are helping to explain as why this plan can work
E sud be the answer coz conclusion is abt the dangerous earthquakes but E tells us that even minor tremors can cause these fish to behave erratically !! so the plan is useless
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Re: To reduce the danger to life and property posed by major earthquakes  [#permalink]

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New post 04 Sep 2014, 00:10
Zarrolou wrote:
To prevent damages caused by earthquakes, scientists will rely on catfish because they swim erratically before earthquakes.

Which of the following, if true, most seriously undermines the usefulness of the proposal?

We have to look for an answer that undermines the connection earthquake => movement of catfish.
E does just that:
(E) Even very slight, fleeting tremors cause catfish to swim erratically
The connection in undermined now

Initially I was quite sure of C, so I want to explain why I discarded it eventually:
(C) Tremors lead to the release of hydrogen sulfide gas into water, thereby causing various fish and shellfish to behave erratically.
The text talks about catfish and not about "various fish", we cannot say anything about catfish.


Hi Zarr,

Choice (E) Even very slight, fleeting tremors cause catfish to swim erratically

Can't we infer that in case of dangerous earthquakes, definitely the cat fish would SWIM erratically?

And hence the proposal of monitoring the CATFISH to predict dangerous earthquakes is strengthened rather than weaken.
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Re: To reduce the danger to life and property posed by major earthquakes  [#permalink]

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New post 04 Sep 2014, 02:25
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My 2 cents, I think answer lies within the story "The Boy Who Cried Wolf" :)
Joke apart.. idea is to find a reliable solution for giving advance warning abt dangerous earthquakes to people.
Now if scientists are relying on a source, which behaves similarly in 2 different situations then how would they decide whether its time to alert ppl abt the major earthquake or not.
Hope this answered your query and didn't create further confusion :)
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Re: To reduce the danger to life and property posed by major earthquakes  [#permalink]

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New post 30 Nov 2014, 18:11
Argument talking about dangerous earthquake and E undermines this argument saying that its not accurate and misleading.

Answer: E

rajatr wrote:
To reduce the danger to life and property posed by major earthquakes, scientists have been investigating several techniques for giving advance warning of dangerous earthquakes. Since catfish swim erratically before earthquakes, some investigators have proposed monitoring catfish to predict dangerous earthquakes.

Which of the following, if true, most seriously undermines the usefulness of the proposal?

(A) In Japan, which is subject to frequent earthquakes, the behavior of catfish has long been associated with earthquakes.
(B) Mechanical methods for detecting earthquakes have not proved effective.
(C) Tremors lead to the release of hydrogen sulfide gas into water, thereby causing various fish and shellfish to behave erratically.
(D) Careful construction can reduce the dangers posed by earthquakes.
(E) Even very slight, fleeting tremors cause catfish to swim erratically

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Re: To reduce the danger to life and property posed by major earthquakes  [#permalink]

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New post 05 Mar 2018, 12:51
I think C at first looks very obvious, but the wording the answer choice involves is tricky. It says that Tremors lead to release of Hydrogen Sulfide..... This is a trap.... we have to assume here that scientists have no method to find the release H2S gas. Then and then only we can move forward. This assumptions makes this choice wrong and also the fact that other fish behave erratically is Inconsistent.
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Re: To reduce the danger to life and property posed by major earthquakes  [#permalink]

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New post 24 Mar 2018, 10:24
rajatr wrote:
To reduce the danger to life and property posed by major earthquakes, scientists have been investigating several techniques for giving advance warning of dangerous earthquakes. Since catfish swim erratically before earthquakes, some investigators have proposed monitoring catfish to predict dangerous earthquakes.

Which of the following, if true, most seriously undermines the usefulness of the proposal?

(A) In Japan, which is subject to frequent earthquakes, the behavior of catfish has long been associated with earthquakes.
(B) Mechanical methods for detecting earthquakes have not proved effective.
(C) Tremors lead to the release of hydrogen sulfide gas into water, thereby causing various fish and shellfish to behave erratically.
(D) Careful construction can reduce the dangers posed by earthquakes.
(E) Even very slight, fleeting tremors cause catfish to swim erratically


(A) In Japan, which is subject to frequent earthquakes, the behavior of catfish has long been associated with earthquakes. Strengthener

(B) Mechanical methods for detecting earthquakes have not proved effective. Out of scope

(C) Tremors lead to the release of hydrogen sulfide gas into water, thereby causing various fish and shellfish to behave erratically. Out of scope

(D) Careful construction can reduce the dangers posed by earthquakes. Out of scope

(E) Even very slight, fleeting tremors cause catfish to swim erratically. Correct.
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Re: To reduce the danger to life and property posed by major earthquakes  [#permalink]

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New post 24 Jul 2018, 15:59
Correct me if I'm wrong

I think if we consider what option E is saying, even a small tremor can cause the catfish to swim erratically. This will make the system even more precise as the system will be able to detect even a very small earthquake. This will strengthen the authors claim.

Please help me understand where I'm going wrong.
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Re: To reduce the danger to life and property posed by major earthquakes  [#permalink]

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New post 27 Sep 2018, 19:57
The question says: Catfish swim erratically before earthquakes, some investigators have proposed monitoring catfish to predict dangerous earthquakes.

To undermine the saying, you have to prove that there may be some other reasons, besides than earthquakes, that can cause catfish swim erratically.

Therefore:
(A) In Japan, which is subject to frequent earthquakes, the behavior of catfish has long been associated with earthquakes. (Act as an example that agree with and strengthen the saying)
(B) Mechanical methods for detecting earthquakes have not proved effective. (No any mechanical method mentioned. Out of scope)
(C) Tremors lead to the release of hydrogen sulfide gas into water, thereby causing various fish and shellfish to behave erratically. (Do not necessarily related to Catfish. Out of Scope)
(D) Careful construction can reduce the dangers posed by earthquakes. (Not related to catfish. Out of Scope)
(E) Even very slight, fleeting tremors cause catfish to swim erratically. (Suggest another reason that causes catfish to swim erratically, besides than earthquakes. -> Correct)
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Re: To reduce the danger to life and property posed by major earthquakes &nbs [#permalink] 27 Sep 2018, 19:57
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To reduce the danger to life and property posed by major earthquakes

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