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20 Apr 2021, 11:20
Kudos
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
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I was trying to solve two questions of CR out of which one needed my prior knowledge than just the info given in the options and the other one wants me to avoid the same. I will past the questions here with their answers.
Question 1:
Nitrogen triiodide is a highly explosive chemical that is easy to
make from only two ingredients: ammonia and concentrated
iodine. However, nitrogen triiodide has never been known to be
used in a terrorist or criminal attack.
Which of the following, if true, is the most likely explanation for
the discrepancy described above?
(A) Ammonia can be bought in a grocery store, but concentrated iodine
must be obtained from somewhat more restricted sources, such as
chemical supply houses.
(B) Nitrogen triiodide is only one of several powerful explosives that
can be made from ammonia.
(C) Many terrorists and criminals have used other chemical explosives
such as TNT or PETN.
(D) Airport security devices are typically calibrated to detect nitrogen
compounds, such as ammonia and ammonium compounds.
(E) Nitrogen triiodide is extremely shock sensitive and can detonate as
a result of even slight movement.
I chose the option A hoping that since Iodide is only available in restricted sources, it will be difficult for it to be procured by the Criminals whereas the correct answer choice is E. The explanation provided for A is " This might explain it…except it doesn’t say that you can’t get iodine. It just says you have to go to a special place, but you can still get it under “somewhat more restricted” conditions. So I’m not sure that really explains why no criminals have ever used it."
Question 2:
In an effort to reduce the number of deer, and therefore decrease
the number of automobile accidents caused by deer, the
government lengthened the deer hunting season earlier this year.
Surprisingly, the number of accidents caused by deer has increased
substantially since the introduction of the longer hunting season.
All of the following, if true, help to explain the increase in traffic
accidents caused by deer EXCEPT:
(A) The presence of humans in the woods causes the deer to move to
new areas, which causes the deer to cross roads more frequently than
normal.
(B) In the area where the deer live, traffic has increased substantially
precisely because of the lengthened hunting season.
(C) Most automobile accidents involving deer result from cars swerving
to avoid deer, and leave the deer in question unharmed.
(D) Deer tend to bolt when hearing gunshots or other loud sounds and
are more likely to run across a road without warning.
(E) A new highway was recently built directly through the state’s
largest forest, which is the primary habitat of the state’s deer
population.
I chose the option B because they spoke only about traffic and nothing related to whether traffics cause accident or not. So, without using my prior knowledge and only from the info given in the choices, I chose B. Whereas the answer choice given is C. If we are not supposed to use any prior knowledge, the answer choice should have been any of A, B, C, D, E because none of it actually talks about accidents. It is only from our prior knowledge, we say that traffic will cause accidents (B), deer running across a road will cause accidents (D), etc,.
Please help me with this as I am struggling a lot with this question of "when and when not to use prior knowledge in answering a CR qn".
Question 1:
Nitrogen triiodide is a highly explosive chemical that is easy to
make from only two ingredients: ammonia and concentrated
iodine. However, nitrogen triiodide has never been known to be
used in a terrorist or criminal attack.
Which of the following, if true, is the most likely explanation for
the discrepancy described above?
(A) Ammonia can be bought in a grocery store, but concentrated iodine
must be obtained from somewhat more restricted sources, such as
chemical supply houses.
(B) Nitrogen triiodide is only one of several powerful explosives that
can be made from ammonia.
(C) Many terrorists and criminals have used other chemical explosives
such as TNT or PETN.
(D) Airport security devices are typically calibrated to detect nitrogen
compounds, such as ammonia and ammonium compounds.
(E) Nitrogen triiodide is extremely shock sensitive and can detonate as
a result of even slight movement.
I chose the option A hoping that since Iodide is only available in restricted sources, it will be difficult for it to be procured by the Criminals whereas the correct answer choice is E. The explanation provided for A is " This might explain it…except it doesn’t say that you can’t get iodine. It just says you have to go to a special place, but you can still get it under “somewhat more restricted” conditions. So I’m not sure that really explains why no criminals have ever used it."
Question 2:
In an effort to reduce the number of deer, and therefore decrease
the number of automobile accidents caused by deer, the
government lengthened the deer hunting season earlier this year.
Surprisingly, the number of accidents caused by deer has increased
substantially since the introduction of the longer hunting season.
All of the following, if true, help to explain the increase in traffic
accidents caused by deer EXCEPT:
(A) The presence of humans in the woods causes the deer to move to
new areas, which causes the deer to cross roads more frequently than
normal.
(B) In the area where the deer live, traffic has increased substantially
precisely because of the lengthened hunting season.
(C) Most automobile accidents involving deer result from cars swerving
to avoid deer, and leave the deer in question unharmed.
(D) Deer tend to bolt when hearing gunshots or other loud sounds and
are more likely to run across a road without warning.
(E) A new highway was recently built directly through the state’s
largest forest, which is the primary habitat of the state’s deer
population.
I chose the option B because they spoke only about traffic and nothing related to whether traffics cause accident or not. So, without using my prior knowledge and only from the info given in the choices, I chose B. Whereas the answer choice given is C. If we are not supposed to use any prior knowledge, the answer choice should have been any of A, B, C, D, E because none of it actually talks about accidents. It is only from our prior knowledge, we say that traffic will cause accidents (B), deer running across a road will cause accidents (D), etc,.
Please help me with this as I am struggling a lot with this question of "when and when not to use prior knowledge in answering a CR qn".
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Critical Reasoning (CR) Forum
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
20 Apr 2021, 11:29
Kudos
Bookmarks
Revankumar
We already have these questions on the forum.
Question 1: nitrogen-triiodide-is-a-highly-explosive-chemical-that-is-easy-to-make-226067.html
Question 2: in-an-effort-to-reduce-the-number-of-deer-and-therefore-decrease-the-199330.html
Please continue discussion in these topics. Thank you.
THIS TOPIC IS LOCKED AND ARCHIVED.
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Critical Reasoning (CR) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
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