CR challenge - 10

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CR challenge - 10

by abhasjha » Wed Aug 26, 2009 10:06 pm
Plant species differ in that renewed growth in spring can be triggered by day
length or by temperature or else by a combination of both. Day length is the
same, year after year, for any given date. Therefore, any plant species that starts
to grow again on widely different dates in different years resumes growth at least
in part in response to temperature.
Which one of the following arguments is most similar in its pattern of reasoning
to the argument above?
(A) In Xandia, medical assistant trainees must either complete a formal training
course or work for one year under the close supervision of a physician. Since
few physicians are willing to act as supervisors, it must be true that most
medical assistant trainees in Xandia take the training course.
(B) In the Crawford area, easterly winds mean rain will come and westerly winds
mean dry weather will come; winds from other directions do not occur.
Therefore, since it is currently raining in Crawford, there must be an easterly
wind blowing there now.
(C) Some landfills charge garbage companies by volume only, some charge by
weight only, and all others use a formula sensitive to both volume and
weight. So if at a particular landfill the charges for two particular loads of
equal volume dumped on the same day are different, weight must determine,
or help determine, charges at that landfill.

(D) Depending on volume of business, either one or two or three store detectives
are needed for adequate protection against shoplifting. Therefore, if on any
particular day store management has decided that three detectives will be
needed, it must be because business that day is expected to be heavy.
(E) A call is more likely to be heard if it is loud rather than soft, if it is highpitched
rather than low-pitched, and especially if it is both loud and highpitched.
Therefore, anyone whose call goes unheard in spite of being at
maximum loudness should try to raise the pitch of the call.
Source: — Critical Reasoning |

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by bustgmat » Wed Aug 26, 2009 10:49 pm
IMO C

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by gmatmachoman » Wed Aug 26, 2009 11:27 pm
the argument applies the following concept.
Explanation:
For doing a process we have 2 options 1 or 2.If Option 1 falsifies or not used, we have to certainly use the option 2 to complete the process.

Same approach is followed in C.

IMO C is a strong contender!!!

OA plz

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by viju9162 » Thu Aug 27, 2009 2:35 am
Confused b/w A and C ? why not A?
"Native of" is used for a individual while "Native to" is used for a large group

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by abhasjha » Thu Aug 27, 2009 11:19 pm
OA - C

official explanation follows :

The key to getting into and out of this question with a quick right answer is the nature of

the conclusion, signaled by "therefore": It boils down to "A particular phenomenon occurs

at least in part because of

a particular factor." If you scan the five choices, the only one
whose conclusion even comes close is (C)'s "weight must determine,

or help determine,
charges." That's all you needed to see. Analyzing things further, the gist of both (C) and the

stimulus is that two causes (day length and temperature/volume and weight), separately

or together, bring about an effect (renewed plant growth/landfill charges); therefore, if one

cause (day length/volume) is identical for all and thus taken out of the equation, then the

other cause (temperature/weight) must have some influence on the effect.

(A)'s conclusion hinges on "most" and "few," which aren't in the stimulus, and lacks an

explicit parallel to the stimulus' "day length or temperature or both."

(B) The certainty of (B)'s conclusion (An easterly wind

must now be blowing) is missing
from the stimulus, and the "east means rain, west means dry" opposition has no parallel in

the stimulus either.

mathematically. To be parallel, (D) would have to draw a conclusion about the number of

store dicks needed, but instead its conclusion explains

why a particular number is needed.
(E)'s conclusion, first of all, is a recommendation ("X should try to do Y"), and that alone

renders (E) impossible. (E) also deviates by bringing in four terms (loud, soft, low- and

high-pitched) and its reference to "especially," none of which appears in the stimulus.



"¢ Keep characterizing the choices and stimulus. Here, only if the stimulus' conclusion

were a recommendation could (E) be correct. And here, since the stimulus'

conclusion is an assertion of partial cause, only (C) need be considered

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by joseph32 » Sun May 15, 2016 9:33 pm
I still feel C should be the answer.