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1000 CR test3

Expert replies
by magical cook » Fri Mar 30, 2007 2:46 pm
Hi,

The correct answer is B); however, I had difficulty in choosing between A) and B) since both answers can bring similar doubts on boast.

Can you explain why B is better??

Meteorologists say that if only they could design an accurate mathematical model of the atmosphere with all its complexities, they could forecast the weather with real precision. But this is an idle boast, immune to any evaluation, for any inadequate weather forecast would obviously be blamed on imperfections in the model.

Which of the following, if true, would cast the most serious doubt on the meteorologists’ boast, aside from the doubt expressed in the passage above?
(A) The amount of energy that the Earth receives from the Sun is monitored closely and is known not to be constant.
(B) Volcanic eruptions, the combustion of fossil fuels, and several other processes that also cannot be quantified with any accuracy are known to have a significant and continuing impact on the constitution of the atmosphere.
(C) As current models of the atmosphere are improved, even small increments in complexity will mean large increases in the number of computers required for the representation of the models.
(D) Frequent and accurate data about the atmosphere collected at a large number of points both on and above the ground are a prerequisite for the construction of a good model of the atmosphere.
(E) With existing models of the atmosphere, large scale weather patterns can be predicted with greater accuracy than can relatively local weather patterns.
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Source: — Critical Reasoning |

by rajesh_ctm » Sat Mar 31, 2007 6:04 pm
How does A cast doubt? The Meteorologists' "if" condition already takes care of A.
(A) The amount of energy that the Earth receives from the Sun is monitored closely and is known not to be constant.
The amount of energy received can be monitored as per the option itself. It may not be constant and it might be complex to measure, but Meteorologists have already mentioned in their "given" condition that they:
"design an accurate mathematical model of the atmosphere with all its complexities"
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Re: 1000 CR test3

by vishubn » Thu Dec 11, 2008 6:41 pm
Meteorologists say that if only they could design an accurate mathematical model of the atmosphere with all its complexities, they could forecast the weather with real precision. But this is an idle boast, immune to any evaluation, for any inadequate weather forecast would obviously be blamed on imperfections in the model.
One more Question

Which of the following, if true, could best be used as a basis for arguing against the author’s position that the meteorologists’ claim cannot be evaluated?
(A) Certain unusual configurations of data can serve as the basis for precise weather forecasts even though the exact causal mechanisms are not understood.
(B) Most significant gains in the accuracy of the relevant mathematical models are accompanied by clear gains in the precision of weather forecasts.
(C) Mathematical models of the meteorological aftermath of such catastrophic events as volcanic eruptions are beginning to be constructed.
(D) Modern weather forecasts for as much as a full day ahead are broadly correct about 80 percent of the time.(E) Meteorologists readily concede that the accurate mathematical model they are talking about is not now in their power to construct.

More curious on the approach :)

vishu

p.s.---Does anyone think CR can be approached with a rule based approach !! I mean can one be sure of the answer choice he/she picks ! as it works for SC ????
KILL !! DIE !! or BEAT my FEAR !!! de@D END!!
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by raunekk » Thu Dec 11, 2008 11:24 pm
p1:meteorologist: accurate mathematical model of atmosphere=>forecast the weather with real precision

p2:author:meteorologists boast and they will transfer blame by saying failure of any evalution was due to fault in the model.Thus they mean to say that an accurate mathemathical model wont help in weather forecast.


assumption:All the processes on earth has some or the other effect on atmosphere and hence can be measured.


(c)talks about number of computers needed-out of scope
(d)talks about the prerequisites- not enough
(e)talks about the existing models- not needed.

(A) The amount of energy that the Earth receives from the Sun is monitored closely and is known not to be constant

The amount of energy is monitored though not constant.But its one of the many factors that can be measured ,which goes in favour of meterologists.

(B)Volcanic eruptions, the combustion of fossil fuels, and several other processes that also cannot be quantified with any accuracy are known to have a significant and continuing impact on the constitution of the atmosphere


There are factors that cannot be measured and hence an accurate model wit perfect precision is doubtful.

Hence its the correct ansswer.

Which of the following, if true, could best be used as a basis for arguing against the author’s position that the meteorologists’ claim cannot be evaluated?
(A) Certain unusual configurations of data can serve as the basis for precise weather forecasts even though the exact causal mechanisms are not understood.
(B) Most significant gains in the accuracy of the relevant mathematical models are accompanied by clear gains in the precision of weather forecasts.
(C) Mathematical models of the meteorological aftermath of such catastrophic events as volcanic eruptions are beginning to be constructed.
(D) Modern weather forecasts for as much as a full day ahead are broadly correct about 80 percent of the time.(E) Meteorologists readily concede that the accurate mathematical model they are talking about is not now in their power to construct.

imo:B

(C)talks about aftermath- not needed
(d)talks about mordern weather forecasts which are 80% correct-but meterologists need more precision
(e)talks about can be constucted or not- thats not what the argument is about.


A) Certain unusual configurations of data can serve as the basis for precise weather forecasts even though the exact causal mechanisms are not understood

there is no surity that the data can be used for precise weather forecast.



(B) Most significant gains in the accuracy of the relevant mathematical models are accompanied by clear gains in the precision of weather forecasts

it says that there is a relation between mathematical models and precision of weather.Thus it weakens the authors claim


thanks,
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by 4meonly » Fri Dec 12, 2008 12:18 am
I am also with B.
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by vishubn » Fri Dec 12, 2008 1:38 am
Quote:
p.s.---Does anyone think CR can be approached with a rule based approach !! I mean can one be sure of the answer choice he/she picks ! as it works for SC ????
_________________
Insomnium's TURN now !!
Can anyone share their views??

Vishu
KILL !! DIE !! or BEAT my FEAR !!! de@D END!!
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by niraj_a » Fri Dec 12, 2008 5:49 am
vishu,

i believe that is one reason that makes CR hard, there are no rules per se.

interpretation and noticing small words such as 'some', 'all', 'avg' become so imp in timed conditions.
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by ashley.com » Fri May 13, 2016 2:27 am
B is the most appropriate answer
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