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Many of today’s mathematicians use computers to test cases that are ei

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Many of today’s mathematicians use computers to test cases that are ei  [#permalink]

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Many of today’s mathematicians use computers to test cases that are either too time-consuming or involve too many variables to test manually, allowing the exploration of theoretical issues that were impossible to test a generation ago


(A) are either too time-consuming or involve too many variables to test manually, allowing the exploration of

(B) either take too much time or involve too many variables to be tested manually; allowing the mathematicians to explore

(C) would either take too much time or involve too many variables to test manually, allowing them to explore

(D) would either be too time-consuming or would involve too many variables to test manually; this capability allows the mathematicians to explore

(E) take too much time or variables to test manually; this capability allows the mathematicians to explore

Originally posted by djanand on 04 Feb 2014, 21:00.
Last edited by Bunuel on 16 Nov 2018, 01:05, edited 3 times in total.
Edited the question.
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Re: Many of today’s mathematicians use computers to test cases that are ei  [#permalink]

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New post 17 Aug 2018, 05:50
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pikolo2510 wrote:
Hey GMATNinja , GMATNinjaTwo , adkikani , abhimahna

Quote:
would either take too much time or involve too many variables to test manually, allowing them to explore


Although I got this right, I'm confused with the usage of 'verb-ing' at the end of the sentence. Allow me to explain

verb-ing when preceded by a comma can only do two things
1. Presents additional information for the preceding clause
2. Tells the result of the preceding clause
Note: - The verbing should make sense with the subject of the preceding clause

In the given question, the preceding clause is

Quote:
are either too time-consuming or involve too many variables to test manually


With the above information, the noun in the preceding clause 'test cases' doesn't make sense with the verbing 'allowing'. Test cases cannot do the work of 'allow'

Can you let me know where am I going wrong?

When you see a verb-ing modifier after a clause, the most important thing is to figure out whether that modifier logically describes the preceding clause. There's a pervasive myth that the verb-ing modifier should logically describe the previous subject, and this kind of narrow analysis can get you into a little bit of trouble.

Take a silly example. "The neighbor's dog bit Natalie's pinkie toe, prompting her husband to call an ambulance." This is perfectly fine. (Although let's all agree that Natalie's husband is overreacting here, and this dog has weirdly precise aim. :)) Did the neighbor's dog prompt Natalie's husband to call an ambulance? Not exactly. This isn't Lassie magically telling someone to call for help. But it is 100% true that the fact that the dog bit Natalie -- in other words, the dog's act of biting Natalie -- prompted her husband to make the phone call. In other words, "prompting" logically modifies the preceding clause, even though it doesn't logically modify that clause's subject in isolation.

The same thing is true of the question in this thread. "Mathematicians" is the subject of the first clause. Do mathematicians allow the exploration of difficult theoretical issues? Not exactly. But does the fact that "mathematicians use computers to test tough cases" allow the exploration of difficult theoretical issues? You bet it does. So the "verb-ing" usage is just fine here, even though it doesn't modify ONLY the subject.

I hope that helps!
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Re: Many of today’s mathematicians use computers to test cases that are ei  [#permalink]

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New post 04 Feb 2014, 23:45
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Many of today’s mathematicians use computers to test cases that are either too time-consuming or involve too many variables to test manually, allowing the exploration of theoretical issues that were impossible to test a generation ago

a) are either too time-consuming or involve too many variables to test manually, allowing the exploration of
Either ... or construction is a parallel marker. 'Or' is followed by a verb and hence, 'either' too should. Because the helping verb 'are' is used before either, this option is wrong.

At an advanced level, 'exploration of' usage is wrong too. Because, participle 'allowing' is modifying the entire clause and we don't know who is doing the 'exploration'. A preferred construction would be 'allowing X to explore ....'. Verb form is preferred over noun form.

b) either take too much time or involve too many variables to be tested manually; allowing the mathematicians to explore
The part of the sentence after the 'semicolon' is not a clause. Eliminate B.

c) would either take too much time or involve too many variables to test manually, allowing them to explore
Errors mentioned in A are corrected here.

d) would either be too time-consuming or would involve too many variables to test manually; this capability allows the mathematicians to explore
'or' is followed by 'would' and so should 'either' be.
Also, 'this' doesn't have a clear referent. Ask yourself, 'this capability' means 'which capability' ??

e) take too much time or variables to test manually; this capability allows the mathematicians to explore
'or' is the parallel marker - 'take too much' and 'variables to test' are not parallel. 'this' doesn't have a clear referent.
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Re: Many of today’s mathematicians use computers to test cases that are ei  [#permalink]

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New post 04 Feb 2014, 23:03
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djanand wrote:
Many of today’s mathematicians use computers to test cases that are either too time-consuming or involve too many variables to test manually, allowing the exploration of theoretical issues that were impossible to test a generation ago

a) are either too time-consuming or involve too many variables to test manually, allowing the exploration of
b) either take too much time or involve too many variables to be tested manually; allowing the mathematicians to explore
c) would either take too much time or involve too many variables to test manually, allowing them to explore
d) would either be too time-consuming or would involve too many variables to test manually; this capability allows the mathematicians to explore
e) take too much time or variables to test manually; this capability allows the mathematicians to explore

Please provide your reasoning.

I don't find the latter part of this statement to be taken as an independent clause. Hence, I eliminated all the options with a semi-colon, leaving me with A and C.

"Would" suggests that something which is going to happen in future. Hence.

This reasoning could be flawed as well, as I am just a beginner.
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Re: Many of today’s mathematicians use computers to test cases that are ei  [#permalink]

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New post 05 Feb 2014, 03:23
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sivasanjeev wrote:
Many of today’s mathematicians use computers to test cases that are either too time-consuming or involve too many variables to test manually, allowing the exploration of theoretical issues that were impossible to test a generation ago

c) would either take too much time or involve too many variables to test manually, allowing them to explore
Errors mentioned in A are corrected here.


Is the usage of pronoun "them" correct ? As per my understanding,keyword them can have two antecedents namely, today’s mathematicians and computers. Though today’s mathematicians is the subject of the sentence, how can we be sure that the pronoun them is referring to the subject and not to computers? Is it the case that the exploration work can be done by today’s mathematicians, hence the keyword them must refer to mathematicians (not to computers) ?
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Re: Many of today’s mathematicians use computers to test cases that are ei  [#permalink]

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New post 05 Feb 2014, 03:45
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Well, Pronoun ambiguity is not an absolute rule upon u can eliminate with confidence an answer choice. In the answer choice C, them logically refers to today's mathemiticans who are able to explore something not the computers. If another answer choice has not any grammatical error, conveys the meaning and clears the doubt about the prounoun ambiguity then it would win over C but in absence of that choice, you should go for C and move on.
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Re: Many of today’s mathematicians use computers to test cases that are ei  [#permalink]

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New post 22 Apr 2014, 01:09
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Between C and E.

E. take too much time or variables to test manually; this capability allows the mathematicians to explore

Too much time or variables -- variables are countable noun thus we can not put it in parallel with much.
Too much time or Too much variables (Incorrect)

IMO: no other option is better than C.
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Re: Many of today’s mathematicians use computers to test cases that are ei  [#permalink]

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New post 29 Jun 2014, 22:39
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Many of today’s mathematicians use computers to test cases that are either too time-consuming or involve too many variables to test manually, allowing the exploration of theoretical issues that were impossible to test a generation ago

a) are either too time-consuming or involve too many variables to test manually, allowing the exploration of
There is a parallelism issue
Many of today’s mathematicians use computers to test cases are too time-consuming
Many of today’s mathematicians use computers to test cases are involve too many variables to test manually
We need to repeat "are" in both the lines and then you can see the issue - Incorrect



b) either take too much time or involve too many variables to be tested manually; allowing the mathematicians to explore
Allowing is a verbing modifier to join the two clauses and cannot be separated by a semi colon. Either side of Semi colon shouldn't dependent on each other "Structurally" bur should depend on meaning wise. - Incorrect

c) would either take too much time or involve too many variables to test manually, allowing them to explore
Perfect

d) would either be too time-consuming or would involve too many variables to test manually; this capability allows the mathematicians to explore - Extra would

e) take too much time or variables to test manually; this capability allows the mathematicians to explore - Doesn't make sense to me at all
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Re: Many of today’s mathematicians use computers to test cases that are ei  [#permalink]

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New post 19 Mar 2016, 06:52
I have a question.

1) Which noun is the subject of the action 'allow'? cases or mathematicians?

Both of them don't make sense in my opinion. It should be the computers.

And the modifier will be like this

"the computers allow today's mathematicians to explore theoretical issues that were impossible to test a generation ago."

Am I right?
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Re: Many of today’s mathematicians use computers to test cases that are ei  [#permalink]

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New post 19 Mar 2016, 08:33
Aves wrote:
I have a question.

1) Which noun is the subject of the action 'allow'? cases or mathematicians?

Both of them don't make sense in my opinion. It should be the computers.

And the modifier will be like this

"the computers allow today's mathematicians to explore theoretical issues that were impossible to test a generation ago."

Am I right?


Hi,

allowing is the VERB +ING modifier and does not modify ant particlar NOUN.
It modifies the preceding clause..


here it is talking of the result of previous clause --Many of today’s mathematicians use computers to test cases

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Re: Many of today’s mathematicians use computers to test cases that are ei  [#permalink]

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New post 19 Mar 2016, 08:38
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chetan2u wrote:
Aves wrote:
I have a question.

1) Which noun is the subject of the action 'allow'? cases or mathematicians?

Both of them don't make sense in my opinion. It should be the computers.

And the modifier will be like this

"the computers allow today's mathematicians to explore theoretical issues that were impossible to test a generation ago."

Am I right?


Hi,

allowing is the VERB +ING modifier and does not modify ant particlar NOUN.
It modifies the preceding clause..


here it is talking of the result of previous clause --Many of today’s mathematicians use computers to test cases


Hi chetan2u,

I know that V-ing modifier modifies the preceding clause as a whole but it should make sense with the subject of the preceding clause as well, shoudn't it?
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Re: Many of today’s mathematicians use computers to test cases that are ei  [#permalink]

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New post 20 Mar 2016, 21:28
kinjiGC wrote:
Many of today’s mathematicians use computers to test cases that are either too time-consuming or involve too many variables to test manually, allowing the exploration of theoretical issues that were impossible to test a generation ago

a) are either too time-consuming or involve too many variables to test manually, allowing the exploration of
There is a parallelism issue
Many of today’s mathematicians use computers to test cases are too time-consuming
Many of today’s mathematicians use computers to test cases are involve too many variables to test manually
We need to repeat "are" in both the lines and then you can see the issue - Incorrect



b) either take too much time or involve too many variables to be tested manually; allowing the mathematicians to explore
Allowing is a verbing modifier to join the two clauses and cannot be separated by a semi colon. Either side of Semi colon shouldn't dependent on each other "Structurally" bur should depend on meaning wise. - Incorrect

c) would either take too much time or involve too many variables to test manually, allowing them to explore
Perfect

d) would either be too time-consuming or would involve too many variables to test manually; this capability allows the mathematicians to explore - Extra would

e) take too much time or variables to test manually; this capability allows the mathematicians to explore - Doesn't make sense to me at all



HI GMATify,

I opted for correct option C but I would like to discuss the usage of "WOULD".
I eliminated other options and in the end left with option C.

But other approach would have been we directly eliminate options A,B and E as "Would" is not used.
I hope in this sentence condition is required so "Would" is required...Please correct me if I am wrong.
Can we do this.. :?:

Please assist.
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Re: Many of today’s mathematicians use computers to test cases that are ei  [#permalink]

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New post 23 Apr 2016, 13:54
Could someone please explain/validate the usage of "this" in independent clauses following a semi-colon? I've seen examples where "this" is ok.. confused. Are such examples wrong?
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Re: Many of today’s mathematicians use computers to test cases that are ei  [#permalink]

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New post 24 Apr 2016, 01:20
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dina98 wrote:
Could someone please explain/validate the usage of "this" in independent clauses following a semi-colon? I've seen examples where "this" is ok.. confused. Are such examples wrong?


this, that, these, and those can act as demonstrative adjectives or demonstrative pronoun.They are called demonstrative as they indicate the location of something.

On GMAT, the use of demonstrative adjectives is fine. For example.

This pen is mine and that one is yours.

Notice that in this sentence this and that are adjectives of nouns pen and one respectively.

The following use of demonstrative pronouns is almost always wrong on GMAT:

This is my pen.
That is good shot.

Here this and that are subject pronouns. Here, this and that are too ambiguous. You can not really relate to the location of the object/thing unless you are actually looking at it.

Demonstrative pronouns when used to indicate the copy of nouns in comparisons is also correct on GMAT. For example:

The population of India is greater than that of US.

Here that refers to population.
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Re: Many of today’s mathematicians use computers to test cases that are ei  [#permalink]

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New post 28 Jul 2017, 15:13
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Responding (very belatedly) to a PM:
Quote:
Is the usage of them in option C correct since it refers to the possessive "todays's mathematicians"?
Thanks in advance!

I think the "rule" you're referring to is this one: a non-possessive pronoun can't generally refer to a possessive noun on the GMAT. (An astute forum member pointed out an exception to this rule on an official question: https://gmatclub.com/forum/sc-og-208881.html. But it's the only one I've ever seen... so I suppose that we can demote this from a "rule" to "a guideline that usually seems to work." Ugh.)

But even if we're trying to enforce the original "rule", there's no problem with the pronoun here at all. "Them" refers back to "mathematicians", which isn't actually possessive. So you're all good here.

I hope this helps!
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Re: Many of today’s mathematicians use computers to test cases that are ei  [#permalink]

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New post 21 May 2018, 21:46
The explanation in the cat said
(C) CORRECT. Take too much time and involve too many variables are properly parallel. The change to the hypothetical form would is acceptable because the sentence indicates that these cases would not be tested if they had to be tested manually. The pronoun them is also acceptable, as it points back to the subject of the first half of the sentence (many of today's mathematicians use computers, allowing them to explore...).


PrakharGMAT wrote:
kinjiGC wrote:
Many of today’s mathematicians use computers to test cases that are either too time-consuming or involve too many variables to test manually, allowing the exploration of theoretical issues that were impossible to test a generation ago

a) are either too time-consuming or involve too many variables to test manually, allowing the exploration of
There is a parallelism issue
Many of today’s mathematicians use computers to test cases are too time-consuming
Many of today’s mathematicians use computers to test cases are involve too many variables to test manually
We need to repeat "are" in both the lines and then you can see the issue - Incorrect



b) either take too much time or involve too many variables to be tested manually; allowing the mathematicians to explore
Allowing is a verbing modifier to join the two clauses and cannot be separated by a semi colon. Either side of Semi colon shouldn't dependent on each other "Structurally" bur should depend on meaning wise. - Incorrect

c) would either take too much time or involve too many variables to test manually, allowing them to explore
Perfect

d) would either be too time-consuming or would involve too many variables to test manually; this capability allows the mathematicians to explore - Extra would

e) take too much time or variables to test manually; this capability allows the mathematicians to explore - Doesn't make sense to me at all



HI GMATify,

I opted for correct option C but I would like to discuss the usage of "WOULD".
I eliminated other options and in the end left with option C.

But other approach would have been we directly eliminate options A,B and E as "Would" is not used.
I hope in this sentence condition is required so "Would" is required...Please correct me if I am wrong.
Can we do this.. :?:

Please assist.
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Re: Many of today’s mathematicians use computers to test cases that are ei  [#permalink]

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New post 13 Aug 2018, 18:26
Hey GMATNinja , GMATNinjaTwo , adkikani , abhimahna

Quote:
would either take too much time or involve too many variables to test manually, allowing them to explore


Although I got this right, I'm confused with the usage of 'verb-ing' at the end of the sentence. Allow me to explain

verb-ing when preceded by a comma can only do two things
1. Presents additional information for the preceding clause
2. Tells the result of the preceding clause
Note: - The verbing should make sense with the subject of the preceding clause

In the given question, the preceding clause is

Quote:
are either too time-consuming or involve too many variables to test manually


With the above information, the noun in the preceding clause 'test cases' doesn't make sense with the verbing 'allowing'. Test cases cannot do the work of 'allow'

Can you let me know where am I going wrong?
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Many of today’s mathematicians use computers to test cases that are ei  [#permalink]

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New post 16 Mar 2019, 07:02
GMATNinja wrote:
Responding (very belatedly) to a PM:
Quote:
Is the usage of them in option C correct since it refers to the possessive "todays's mathematicians"?
Thanks in advance!

I think the "rule" you're referring to is this one: a non-possessive pronoun can't generally refer to a possessive noun on the GMAT. (An astute forum member pointed out an exception to this rule on an official question:. But it's the only one I've ever seen... so I suppose that we can demote this from a "rule" to "a guideline that usually seems to work." Ugh.)

But even if we're trying to enforce the original "rule", there's no problem with the pronoun here at all. "Them" refers back to "mathematicians", which isn't actually possessive. So you're all good here.

I hope this helps!


On the same note, I have one more question. Is it possible for pronoun to have antecedent in preposition. I remember that noun in preposition can't act as subject.

Also, this sentence is in the simple present. As far as I know, only following combinations are allowed:
1. Simple present + simple future
2. Simple past + 'would'

This makes "would" in this sentence incorrect. Please correct me if I am wrong.
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Re: Many of today’s mathematicians use computers to test cases that are ei  [#permalink]

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New post 19 May 2019, 03:46
Experts, can you please shed some light on the use of verb-ing modifier for this question.
So as per my understanding:
allowing = verb-ing --> correctly presents the result of the mathematicians using computers for rnd.
Now, as per my understanding the doer of the verb-in modifier and the main action (=use of computers) must be the same.
In this case, the doer of "allowing the exploration" = use of computers, while doer of "use of computers" = many of mathematicians.
Hence, the use of verb-ing is incorrect.
Pleas help me understand where I am going wrong.
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Re: Many of today’s mathematicians use computers to test cases that are ei  [#permalink]

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New post 29 Oct 2019, 05:07
aniket16c wrote:
Experts, can you please shed some light on the use of verb-ing modifier for this question.
So as per my understanding:
allowing = verb-ing --> correctly presents the result of the mathematicians using computers for rnd.
Now, as per my understanding the doer of the verb-in modifier and the main action (=use of computers) must be the same.
In this case, the doer of "allowing the exploration" = use of computers, while doer of "use of computers" = many of mathematicians.
Hence, the use of verb-ing is incorrect.
Pleas help me understand where I am going wrong.


egmat I would love your inputs on this issue.
This is a question from Manhattan CATs.
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Re: Many of today’s mathematicians use computers to test cases that are ei   [#permalink] 29 Oct 2019, 05:07

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