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505-555 Level|   Meaning/Logical Predication|   Modifiers|                     
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A. Modf issue : "Studying…" must modify Scientist ; "from this" is unnecessary
B. same as A
C. Meaning issue - evidence from studying ….evidence was collected based on analysis ; being able to deduced modifies what?
D. logical antecedent of "they" is Scientist(gramatically can refer to Skeletons) - Non-deterministic; "it" logically refers to "evidence" ; meaning issue - unearthing of evidence didn’t help the scientist in deducing it was the studyng of skeletons
E. Correct
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Hello experts, MartyTargetTestPrep, GMATNinja, AjiteshArun, egmat

I have some doubts about answer choice C. What are the primary points wrong with it? Based on my analysis and the above, it seems there are three errors: (1) "studying skeletons" seems to illogically suggest there are type of skeletons (i.e., skeletons that are studying); (2) "being able" I always get tripped with "being," but I don't believe I ever seen it used correctly as a modifier; (3) "this" is too far away from its antecedent - "DNA evidence" (also is the use of "this" along as a pronoun always too colloquial for the GMAT?)

Thank you in advance!
"From studying skeletons" does indeed convey that the scientists recovered DNA "from" a certain type of skeletons, "studying skeletons." If the sentence said, "by studying skeletons," it would make sense.

The problem with "Scientists recovered DNA evidence ..., being able to deduce from this" is that it seems to convey that the reason why the scientists were able to recover DNA evidence is that they are able to deduce something from it. Of course this meaning does not make sense.

Finally, "this" is not ideal. "This" is used for pointing out a specific noun. "It" would be a more logical pronoun for referring to the DNA evidence.



KarishmaB

For Choice E, I had a question on "deduce that." I have seen many verbs on the GMAT be accompanied by "that" after. It has become common convention to prefer "that" after verbs because it adds a level of specificity from my understanding of the usage?

The classic example that Manhattan Prep offers is something along the lines of: "I know Kayne West is a musician" = you personally know Kayne vs. "I know that Kayne West is a musician" = you know of Kayne and that he is a musician.

An example that confuses me: "I believe she will win" vs "I believe that she will win" --> why is the "that" needed?

So, essentially, when is the "that" not necessary?

• Similarly on this question: https://gmatclub.com/forum/by-using-a-p ... 45196.html I am not sure why "that" is omitted after "sounds". I realize that this is in the non-underlined portion of the question, but I would have expected to see a "that" after sounds to be "By using a process called echolocation to analyze the echoes of the high-pitched sounds THAT they produce."

• And on this question: https://gmatclub.com/forum/seismologist ... 93426.html why would you need to say "signals THAT WERE detected"?

Thank you again for being a rockstar :)
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Hello experts, MartyTargetTestPrep, GMATNinja, AjiteshArun, egmat

I have some doubts about answer choice C. What are the primary points wrong with it? Based on my analysis and the above, it seems there are three errors: (1) "studying skeletons" seems to illogically suggest there are type of skeletons (i.e., skeletons that are studying); (2) "being able" I always get tripped with "being," but I don't believe I ever seen it used correctly as a modifier; (3) "this" is too far away from its antecedent - "DNA evidence" (also is the use of "this" along as a pronoun always too colloquial for the GMAT?)

Thank you in advance!
"From studying skeletons" does indeed convey that the scientists recovered DNA "from" a certain type of skeletons, "studying skeletons." If the sentence said, "by studying skeletons," it would make sense.

The problem with "Scientists recovered DNA evidence ..., being able to deduce from this" is that it seems to convey that the reason why the scientists were able to recover DNA evidence is that they are able to deduce something from it. Of course this meaning does not make sense.

Finally, "this" is not ideal. "This" is used for pointing out a specific noun. "It" would be a more logical pronoun for referring to the DNA evidence.



KarishmaB

For Choice E, I had a question on "deduce that." I have seen many verbs on the GMAT be accompanied by "that" after. It has become common convention to prefer "that" after verbs because it adds a level of specificity from my understanding of the usage?

The classic example that Manhattan Prep offers is something along the lines of: "I know Kayne West is a musician" = you personally know Kayne vs. "I know that Kayne West is a musician" = you know of Kayne and that he is a musician.

An example that confuses me: "I believe she will win" vs "I believe that she will win" --> why is the "that" needed?

So, essentially, when is the "that" not necessary?

• Similarly on this question: https://gmatclub.com/forum/by-using-a-p ... 45196.html I am not sure why "that" is omitted after "sounds". I realize that this is in the non-underlined portion of the question, but I would have expected to see a "that" after sounds to be "By using a process called echolocation to analyze the echoes of the high-pitched sounds THAT they produce."

• And on this question: https://gmatclub.com/forum/seismologist ... 93426.html why would you need to say "signals THAT WERE detected"?

Thank you again for being a rockstar :)

The verb 'deduced' will take an object after it. Deduced what?

He deduced the answer.
'the answer' is what he deduced.

When we need to give a clause, we use the 'that clause.' Here, 'that clause' acts as a noun. The use of 'that' shows that the clause that follows is what was deduced.
Scientists deduced that an epidemic struck in the empire's waning days.

Scientists deduced an epidemic struck in the empire's waning days.
If we remove the 'that,' it becomes a bit hard to understand at least in the first read. Did they deduce 'an epidemic' (the way he deduced 'the answer')? So we use 'that.'

When we use 'that clause' as a relative clause such that 'that' is the object of the relative clause, we can omit it without changing the meaning or causing ambiguity.

'... analyse the sounds they produce' or '... analyse the sounds that they produce' are the same.
In the relative clause, 'they produce the sounds,' the sounds is the object of the verb 'produce.'

When the antecedent of 'that' is the subject of the relative clause, we cannot omit 'that'
For example:
I can hear the sounds that are causing these vibrations.
We cannot omit 'that' here - I can hear the sounds are causing these vibrations.
'are causing' is a verb here.

Though we can use present participle modifier.
I can hear the sounds causing these vibrations.
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KarishmaB

hello! I am so sorry to come back to this and bother you again. For the question I linked to "(A) the upward thrust that threw one man straight into the air, and the strange electromagnetic signals detected hours before the temblor" wouldn't this be correct without "that"?

Also for: "I believe she will win" vs "I believe that she will win" --> is the "that" needed because if you remove it, the meaning is changed to "you believe in the individual herself... rather than you believe that this individual will win?

Unfortunately, I am still struggling on this topic. Thank you again for all of your help.
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KarishmaB

hello! I am so sorry to come back to this and bother you again. For the question I linked to "(A) the upward thrust that threw one man straight into the air, and the strange electromagnetic signals detected hours before the temblor" wouldn't this be correct without "that"?

Also for:
"I believe she will win" vs "I believe that she will win" --> is the "that" needed because if you remove it, the meaning is changed to "you believe in the individual herself... rather than you believe that this individual will win?

Unfortunately, I am still struggling on this topic. Thank you again for all of your help.


'that clauses' have different uses. A 'that clause' can be a noun clause (acts as a noun). It is a good idea to use 'that' for clarity.
I believe that she will win.
Tells us what it is that I believe.

I believe she will win.
is used commonly in spoken English and may be quite acceptable for short clauses which are easy to understand but it is better to use 'that' for complete clarity.

'that clause' can be a relative clause (adjective) in which case it modifies a noun.

"(A) the upward thrust that threw one man straight into the air, and the strange electromagnetic signals detected hours before the temblor"

'that threw one man straight into the air,' modifies 'the upward thrust.'
In the that clause, 'that' stands for 'the upward thrust' and is the subject. The upward thrust threw one man into the air.
We cannot remove 'that' here.

Consider: the upward thrust that the rocket experienced ....
Here, 'that' is the object of the 'that clause'.
The rocket experienced the upward thrust. Here we can remove 'that'
'the upward thrust the rocket experienced ...' is fine.
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KarishmaB

Hi Karishma,

(C) Scientists recovered DNA evidence from studying skeletons unearthed near Rome, being able to deduce from this
Can you please explain the role of "being"?

Also I'm confuse with the sentence structure. (Main clause, dependent clause?)
"being able to deduce from this" - Is it a modifier?
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KarishmaB

Hi Karishma,

(C) Scientists recovered DNA evidence from studying skeletons unearthed near Rome, being able to deduce from this
Can you please explain the role of "being"?

Also I'm confuse with the sentence structure. (Main clause, dependent clause?)
"being able to deduce from this" - Is it a modifier?

There is no point evaluating the structure of every incorrect option because often the structure would be incorrect.
In (C), they probably wanted to give a comma + verb-ing structure to show cause - effect (assuming that some students may think it makes sense) but this case is not an example of cause-effect. The effect is often automatically derived from the previous action when used correctly.
Hence, 'comma + being able to deduce' is not the correct structure.
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Dear Friends,

Here is a detailed explanation to this question-
AbdurRakib
Studying skeletons unearthed near Rome, DNA evidence was recovered by scientists, who were able to deduce from this that an epidemic of malaria struck in the empire’s waning days.


(A) Studying skeletons unearthed near Rome, DNA evidence was recovered by scientists, who were able to deduce from this

(B) In studying skeletons unearthed near Rome, DNA evidence was recovered by scientists, who were able to deduce from this

(C) Scientists recovered DNA evidence from studying skeletons unearthed near Rome, being able to deduce from this

(D) Skeletons unearthed near Rome allowed scientists to recover DNA evidence, and they were able to deduce from it

(E) Scientists studying skeletons unearthed near Rome recovered DNA evidence from which they were able to deduce


Meaning is crucial to solving this problem:
Understanding the intended meaning is key to solving this question; the intended meaning of this sentence is that scientists who were studying skeletons unearthed near Rome recovered DNA evidence, and from this evidence, they were able to deduce that an epidemic of malaria struck in the empire’s waning days.

Concepts tested here: Meaning + Modifiers + Pronouns + Awkwardness/Redundancy

• In a “phrase + comma + noun” construction, the phrase must correctly modify the noun; this is one of the most frequently tested concepts on GMAT sentence correction.

A:
1/ This answer choice incorrectly uses "Studying skeletons unearthed near Rome" to modify "DNA evidence", illogically implying that the DNA evidence was studying the skeletons; the intended meaning is that the scientists were studying the skeletons; remember, in a “phrase + comma + noun” construction, the phrase must correctly modify the noun.
2/ Option A suffers from pronoun ambiguity, as it is unclear whether "this" refers to "DNA evidence" or to the act of unearthing the DNA evidence, as a placeholder pronoun.

B:
1/ This answer choice incorrectly uses "In studying skeletons unearthed near Rome" to modify "DNA evidence", illogically implying that the DNA evidence was studying the skeletons; the intended meaning is that the scientists were studying the skeletons; remember, in a “phrase + comma + noun” construction, the phrase must correctly modify the noun.
2/ Option B suffers from pronoun ambiguity, as it is unclear whether "this" refers to "DNA evidence" or to the act of unearthing the DNA evidence, as a placeholder pronoun.

C:
1/ This answer choice suffers from pronoun ambiguity, as it is unclear whether "this" refers to "DNA evidence" or to the act of unearthing the DNA evidence, as a placeholder pronoun.
2/ Option C uses the passive phrase "being able to deduce", leading to awkwardness and redundancy.

D:
1/ This answer choice slightly alters the meaning of the sentence through the clause "Skeletons...allowed scientists to recover DNA evidence"; the construction of this clause implies that because of the skeletons scientists were able to recover DNA evidence; the intended meaning is that scientists who were studying the skeletons discovered DNA evidence.
2/ Option D uses the needlessly indirect construction "and they were able to deduce from it", rendering it awkward and needlessly indirect.

E: Correct.
1/ This answer choice avoids the meaning errors seen in Options A,B, and D, as it uses the clause "Scientists studying skeletons unearthed near Rome recovered DNA evidence"; the modification of "Scientists" with the phrase "studying skeletons" and the construction of this clause conveys the intended meaning - that scientists who were studying the skeletons discovered DNA evidence.
2/ Option E avoids the pronoun error seen in Options A, B, and C, as it modifies the noun "DNA evidence" with the phrase "from which they were able to deduce", clearly referring to "DNA evidence" with the pronoun "which".
3/ Option E is free of any awkwardness or redundancy.

Hence, E is the best answer choice.

To understand the concept of "Phrase Comma Subject" and "Subject Comma Phrase" on GMAT, you may want to watch the following video (~1 minute):



All the best!
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GMATNinja There are conflicting notes above on the role of "they" in Option D. I understand that it is wrong, but from a learning perspective, I am trying to understand if "they" is incorrect because of ambiguity or because it clearly refers to skeletons. I understand there are other elements that are wrong with the sentence as well, but I am trying to understand "they". Could you clarify if this is correct:

"if a pronoun is the subject of a clause and has two possible antecedents of which one is the subject of another clause in the sentence, then the pronoun would unambiguously, by virtue of parallelism, refer to the subject antecedent. Hence in option D, "they" clearly refers to "skeletons", and hence the sentence is wrong."
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AjiteshArun
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Hi Experts GMATNinja GMATNinjaTwo

Can you please explain what is so awkward about (D)

(A) and (B) are clearly out since opening verb-ing modifier should modify scientists and not evidence.

(C) being is not used in passive continuous tense also I feel evidence from is incorrect. It should be evidence by studying ..

(D)they correctly refers to scientists and not skeletons , is the phrase - from it- wordier?

(E) I did not select this since was confused if recovered is verb or modifier? note that there is no helping verb here. Does 'they' can only refer to subject in first independent clause ie scientists?
Option D gives a lot of importance to the noun skeletons, going so far as to make it the subject of the sentence. This means that the they is not very clear. It could refer to skeletons or scientists. For example:

A allowed B to enter the room, and he took the test. Super ambiguous, as the he could refer to either A or B.

Also, the structure of the sentence (with D) is not very good. There is a big difference between setting the sentence up as [the two things that scientists did] and setting the sentence up as [skeletons did one thing, and scientists did the other].

In option E, recovered is a verb (subject: scientists). We don't use a helping verb as we're in the active voice.

Scientists recovered DNA evidence. (active)
DNA evidence was recovered by scientists. (passive)

i just wanted to ask in option E When reading the part "unearthed near Rome recovered". Doesn't it sound like that Rome recovered DNA evidence??
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i just wanted to ask in option E When reading the part "unearthed near Rome recovered". Doesn't it sound like that Rome recovered DNA evidence??
Hi Danish234,

No. The word near is a preposition, and we expect to see nouns (or gerunds) after prepositions. We don't expect clauses, which means that a reader is very unlikely to connect recovered to Rome. For example:

1. A cricket match played in New Delhi was watched by millions of people. ← We can safely assume that most people would not think that New Delhi was the thing that was watched.

This is not to say that option E is perfect (it can be read in ways that the author did not intend), but as long as it's better than the other 4 options, we should feel comfortable marking it and moving on.
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