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new information in CR answer choices - when

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new information in CR answer choices - when [#permalink]

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New post 28 Sep 2017, 04:20
Hi,

Iv'e recently noticed that I have same mistakes in CR questions, regarding the use of new information, that was not part of the argument, in the answer choices.

for example: questions 555 and 664 (OG 2017) are both construction type - however 555 uses new information in its answer, while 664 official explanation says that new information cannot be used for the right answer.

I'll be very thankful if someone can explain when the use of new information in the choices is "forbidden".

also, are there some question types that have to be based only on the information provided in the passage?


Thanks everyone

Last edited by omavsp on 28 Sep 2017, 04:24, edited 2 times in total.

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Re: new information in CR answer choices - when [#permalink]

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New post 28 Sep 2017, 04:23
for question 555 please search: "alligators prey heavily on gmat"
for question 664 please search: "pattern within a matrix gmat"
(i'm new here and therefore cannot post links - sorry)

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Re: new information in CR answer choices - when [#permalink]

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New post 28 Sep 2017, 04:48
Hi
According to power score bible, out of the three families prove , help and hurt .
You can not use new information in prove family while you can use new information in help and hurt family.

Hope this helps
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Re: new information in CR answer choices - when [#permalink]

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New post 28 Sep 2017, 04:53
mbaaspirant80 wrote:
Hi
According to power score bible, out of the three families prove , help and hurt .
You can not use new information in prove family while you can use new information in help and hurt family.

Hope this helps


thank you for the answer.

Do you have any source I can use to try to learn how to identify these families?

Thanks again !

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Re: new information in CR answer choices - when [#permalink]

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New post 28 Sep 2017, 08:48
omavsp wrote:
mbaaspirant80 wrote:
Hi
According to power score bible, out of the three families prove , help and hurt .
You can not use new information in prove family while you can use new information in help and hurt family.

Hope this helps


thank you for the answer.

Do you have any source I can use to try to learn how to identify these families?

Thanks again !


Hi omavsp,

Refer to the following thread:
https://gmatclub.com/forum/critical-reasoning-megathread-145178.html

you need to learn the DIFFERENT TYPE of CR questions. For the quick information about when you can use new info and when you cannot see below. this URL is mentioned in the above mega thread.

https://gmatclub.com/forum/cr-methods-an-approach-to-find-the-best-answers-93146.html
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Re: new information in CR answer choices - when [#permalink]

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New post 01 Oct 2017, 13:27
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omavsp wrote:
Hi,

Iv'e recently noticed that I have same mistakes in CR questions, regarding the use of new information, that was not part of the argument, in the answer choices.

for example: questions 555 and 664 (OG 2017) are both construction type - however 555 uses new information in its answer, while 664 official explanation says that new information cannot be used for the right answer.

I'll be very thankful if someone can explain when the use of new information in the choices is "forbidden".

also, are there some question types that have to be based only on the information provided in the passage?


Thanks everyone


New information - from outside of the argument - is good in Strengthen the Argument, Weaken the Argument, Evaluate the Argument, and Explain the Discrepancy questions. In these question types, you're basically adding new evidence to the argument that would make it better or worse. That evidence can come from anywhere, as long as it has an effect on the conclusion.

New information is bad in Find the Assumption and Draw a Conclusion questions.

In Find the Assumption, you're looking for something that already has to be true, before the conclusion can be drawn. When you pick an answer choice, you're saying that the answer choice is critically necessary to the argument - without it, the argument wouldn't make any sense. So it can't really be brand new information, because brand new, random information from outside of the argument is unlikely to be a critical component of the argument.

That said, sometimes Find the Assumption correct answers will look out of scope, usually when they're phrased as a negative. For example:

premise: The train left on time.
conclusion: The train will arrive on time.
assumption: A meteor won't destroy the train tracks before the train arrives.

The meteor bit looks like new information, but it's actually okay, because it's phrased as a negative - some weird thing won't happen. If it said that a meteor will destroy the train tracks, that would be much less likely to be right.

In Draw a Conclusion, you can't use any new information at all, in any way. The only information you can use to pick your answer is the information that's written in the text of the argument itself. Many wrong answers come from adding in your own facts or reasoning instead of only using what the argument says.
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Re: new information in CR answer choices - when   [#permalink] 01 Oct 2017, 13:27
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