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Register now and save up to $200 Available with Beat the GMAT members only code • Free Practice Test & Review How would you score if you took the GMAT Available with Beat the GMAT members only code • Reach higher with Artificial Intelligence. Guaranteed Now free for 30 days Available with Beat the GMAT members only code • Free Veritas GMAT Class Experience Lesson 1 Live Free Available with Beat the GMAT members only code • Free Trial & Practice Exam BEAT THE GMAT EXCLUSIVE Available with Beat the GMAT members only code • 5-Day Free Trial 5-day free, full-access trial TTP Quant Available with Beat the GMAT members only code ## Strengthen CR This topic has 2 expert replies and 3 member replies prachi18oct Master | Next Rank: 500 Posts Joined 27 Apr 2014 Posted: 269 messages Followed by: 5 members Upvotes: 8 #### Strengthen CR Mon Jul 13, 2015 2:49 pm Airline: Newly developed collision-avoidance systems, although not fully tested to discover potential malfunctions, must be installed immediately in passenger planes. Their mechanical warnings enable pilots to avoid crashes. Pilots: Pilots will not fly in planes with collision-avoidance systems that are not fully tested. Malfunctioning systems could mislead pilots, causing crashes. The pilotsâ€™ objection is most strengthened if which of the following is true? (A) It is always possible for mechanical devices to malfunction. (B) Jet engines, although not fully tested when first put into use, have achieved exemplary performance and safety records. (C) Although collision-avoidance systems will enable pilots to avoid some crashes, the likely malfunctions of the not-fully-tested systems will cause even more crashes. (D) Many airline collisions are caused in part by the exhaustion of overworked pilots. (E) Collision-avoidance systems, at this stage of development, appear to have worked better in passenger planes than in cargo planes during experimental flights made over a six-month period. I stuck between A and C. Although C sounds more reasonable and close to what pilot is pointing to, if A were not true the pilot's argument will be weakened. How to eliminate incorrect options in such cases? ### GMAT/MBA Expert DavidG@VeritasPrep Legendary Member Joined 14 Jan 2015 Posted: 2667 messages Followed by: 120 members Upvotes: 1153 GMAT Score: 770 Tue Sep 26, 2017 9:01 am zaidq1 wrote: why is option d wrong ? The pilot's argument is that crash-avoidance systems should not be implemented until they're fully tested. Essentially, in the argument between using old fully-tested systems and newer untested systems, the pilots prefer the former. The question of whether crashes are caused by exhausted pilots sheds no light on the importance of having fully-tested systems. In other words, the key question is whether a malfunctioning new system is likely to cause more crashes than it prevents, not whether pilot exhaustion is the culprit. _________________ Veritas Prep | GMAT Instructor Veritas Prep Reviews Save$100 off any live Veritas Prep GMAT Course

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zaidq1 Newbie | Next Rank: 10 Posts
Joined
14 Nov 2015
Posted:
1 messages
Mon Sep 25, 2017 10:41 pm
why is option d wrong ?

### GMAT/MBA Expert

DavidG@VeritasPrep Legendary Member
Joined
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Mon Jul 13, 2015 4:09 pm
Quote:
Airline: Newly developed collision-avoidance systems, although not fully tested to discover potential
malfunctions, must be installed immediately in passenger planes. Their mechanical warnings enable pilots to
avoid crashes.
Pilots: Pilots will not fly in planes with collision-avoidance systems that are not fully tested. Malfunctioning systems could mislead pilots, causing crashes.

The pilotsâ€™ objection is most strengthened if which of the following is true?

(A) It is always possible for mechanical devices to malfunction.
(B) Jet engines, although not fully tested when first put into use, have achieved exemplary performance and
safety records.
(C) Although collision-avoidance systems will enable pilots to avoid some crashes, the likely malfunctions of
the not-fully-tested systems will cause even more crashes.
(D) Many airline collisions are caused in part by the exhaustion of overworked pilots.
(E) Collision-avoidance systems, at this stage of development, appear to have worked better in passenger
planes than in cargo planes during experimental flights made over a six-month period.

I stuck between A and C. Although C sounds more reasonable and close to what pilot is pointing to, if A were not true the pilot's argument will be weakened.
How to eliminate incorrect options in such cases?
Put yourself in the position of the airline. You're trying to make a decision about whether it's a good idea to install this new technology. Which piece of information helps you make that decision? 'A' is telling you something that you already know! There is no complex technology -nor will there ever be - that never malfunctions. One that works 99.999% of the time might be a good investment, and one that works 30% of the time will be a lousy investment. Both sometimes malfunction. We're trying to determine whether we wish to use this one particular system, and in order to do so, we need to project whether the new technology provides a net benefit. How many crashes will the new system allow pilots to avoid vs. how many crashes will the new system cause? This is what C gives us. If the system is causing more crashes than it's preventing, it's not something we want any part of.

(I find that, in general, putting yourself in the shoes of whoever is involved in a CR argument can help clarify what's most important when evaluating that argument.)

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bubbliiiiiiii Legendary Member
Joined
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Test Date:
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GMAT Score:
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Mon Jul 13, 2015 11:21 pm
Quote:
I stuck between A and C. Although C sounds more reasonable and close to what pilot is pointing to, if A were not true the pilot's argument will be weakened.
How to eliminate incorrect options in such cases?
I eliminated A because, its states that collision-avoidance systems, a mechanical device, will even fail after being fully tested. However, C talks about likelihood of crashes based on usage of fully tested and partially tested collision-avoidance system.

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nikhilgmat31 Legendary Member
Joined
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Posted:
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Test Date:
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Thu Jul 30, 2015 4:14 am
any mechanical device can fail. so eliminate A.

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