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Strengthen CR

This topic has 2 expert replies and 3 member replies
prachi18oct Master | Next Rank: 500 Posts
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Strengthen CR

Post 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 pilots’ 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?

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zaidq1 Newbie | Next Rank: 10 Posts
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Post Mon Sep 25, 2017 10:41 pm
why is option d wrong ?

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Post 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.

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zaidq1 Newbie | Next Rank: 10 Posts
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Post Mon Sep 25, 2017 10:41 pm
why is option d wrong ?

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Post 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.

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nikhilgmat31 Legendary Member Default Avatar
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Post Thu Jul 30, 2015 4:14 am
any mechanical device can fail. so eliminate A.

Answer is C

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