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Bunuel
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HI Bunuel bb

I can see you posting questions under the source as GMATPrep. Are these new questions, which we are going to encounter in GMATPrep CAT?
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Many legal experts who admit that polygraph testing is not completely accurate nevertheless advocate its expanded use in criminal cases, arguing that perfection in evidence is not and never has been required, neither in science nor in our courts.


A. is not and never has been required, neither in science nor WRONG Double negation

B. is and has been required not in science nor Misplaced NOT

C. is not and never has been required, either in science or CORRECT

D. should not and never has been required, either in science or

E. should and has been required neither in science nor

DM if you have any queries.I would love to help :)
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HI Bunuel bb

I can see you posting questions under the source as GMATPrep. Are these new questions, which we are going to encounter in GMATPrep CAT?
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Yes.
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Many legal experts who admit that polygraph testing is not completely accurate nevertheless advocate its expanded use in criminal cases, arguing that perfection in evidence is not and never has been required, neither in science nor in our courts.


A. is not and never has been required, neither in science nor --"neither ... nor" makes it double negation by getting appended to previous negation (is not... never has been)

B. is and has been required not in science nor -- dilutes the meaning.

C. is not and never has been required, either in science or -- CORRECT, fixes the error from A

D. should not and never has been required, either in science or -- "should" is not correct verb tense here. Legal experts are not talking about moral obligations of science

E. should and has been required neither in science nor -- same as D


So, it should be C
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Many legal experts who admit that polygraph testing is not completely accurate nevertheless advocate its expanded use in criminal cases, arguing that perfection in evidence// is not and never has been required, neither in science nor// in our courts.


A. is not and never has been required, neither in science nor

B. is and has been required not in science nor

C. is not and never has been required, either in science or

D. should not and never has been required, either in science or

E. should and has been required neither in science nor

ellipsis is not hard but tricky. inferring the cut off part is the first job for ellipsis and comparison problems.
in choice D and E, it should be 'should not be required'. but "be" dose not appear and the phrase is 'should not been required'. this is not grammatical.

the second point is about scope of negation.

in a clause, all parts following the negation word are affected by it. this mean, in choice C, all words following"not and never" are in negation scope. so, we use 'either in...." because this phrase is under negation scope. if we use "nor", double negation occurs. wrong.

but if we want to continue a negation for a second clause, we can use 'nor'

the class dont learn gmat tonight, neither dose gmat teacher come

a further point about scope of negation can be seen in the following example.

a perfect evidence is not required in any field, either in science or courts.
a perfect evidence is not required in some fields, neither in science nor courts.

in the first sentence, scope of negation is from after negation word to the end of the sentence. that is why "either..or" is used and we dont need to use negation words before 'science".

in the second sentence, 'in some field' is not under scope of negation. evidence is require in some fields but not in other. so, we have to use "neither ...nor" to negate "science and courts."

so, concept of " double negation" is not easy.
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Bunuel
Many legal experts who admit that polygraph testing is not completely accurate nevertheless advocate its expanded use in criminal cases, arguing that perfection in evidence is not and never has been required, neither in science nor in our courts.


A. is not and never has been required, neither in science nor

B. is and has been required not in science nor

C. is not and never has been required, either in science or

D. should not and never has been required, either in science or

E. should and has been required neither in science nor


SC16553

It's between A and C: 'neither...nor' or 'either...or'

Neither indicates that two ideas are linked together. Its use represents a negative conjunction. In the given sentence, 'neither...nor' is not correct because we already have a negative preceding it.

arguing that perfection in evidence is not and never has been required, neither in science nor in our courts.

The portion in blue is negative. Therefore it's more appropriate to use 'either...or':

Many legal experts who admit that polygraph testing is not completely accurate nevertheless advocate its expanded use in criminal cases, arguing that perfection in evidence is not and never has been required, either in science or in our courts.
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ChiranjeevSingh
Here's the official explanation provided by the GMAC for this question:
...
The tags say this is a GMATPREP question.
Where can we find such official explanations for GMATPREP questions?

Posted from my mobile device
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The right answer’s C — it’s the only one that keeps the grammar smooth and the meaning intact. The rest either mess with the tense or use clunky constructions.
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