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555-605 Level|   Meaning/Logical Predication|   Modifiers|   Pronouns|   Verb Tense/Form|                           
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Dear Friends,

Here is a detailed explanation to this question-
bakfed
Although the first pulsar, or rapidly spinning collapsed star, to be sighted was in the summer of 1967 by graduate student Jocelyn Bell, it had not been announced until February, 1968.


(A) Although the first pulsar, or rapidly spinning collapsed star, to be sighted was in the summer of 1967 by graduate student Jocelyn Bell, it had not been announced until February, 1968.

(B) Although not announced until February, 1968, in the summer of 1967 graduate student Jocelyn Bell observed the first pulsar, or rapidly spinning collapsed star, to be sighted.

(C) Although observed by graduate student Jocelyn Bell in the summer of 1967, the discovery of the first sighted pulsar, or rapidly spinning collapsed star, had not been announced before February, 1968.

(D) The first pulsar, or rapidly spinning collapsed star, to be sighted was observed in the summer of 1967 by graduate student Jocelyn Bell, but the discovery was not announced until February, 1968.

(E) The first sighted pulsar, or rapidly spinning collapsed star, was not announced until February, 1968, while it was observed in the summer of 1967 by graduate student Jocelyn Bell.


Verbal Question of The Day: Day 231: Sentence Correction


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Masters of Time: Cosmology at the End of Innocence - Page 78

John Boslough - 1993

The old cosmology of a less hurried, more *The pulsars were first detected by graduate student Jocelyn Bell in the summer of 1967, confirmed in the fall, but not announced until the following February.

Meaning is crucial to solving this problem:
Understanding the intended meaning is key to solving this question; the intended core meaning of this sentence is that the first pulsar to be sighted was observed in the summer of 1967 by graduate student Jocelyn Bell, but the discovery was not announced until February 1968.

Concepts tested here: Meaning + Modifiers + Tenses + Pronouns + Idioms

• 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.
• The past perfect tense (marked by the use of helping verb "had") is used when a sentence contains two actions in the past; the helping verb "had" is used with the action in the "greater past".
• “although” and “despite” are used to show contrast.
• “while” is used for actions that take place simultaneously, irrespective of whether these actions are positive, negative, or neutral.

A: This answer choice alters the meaning of the sentence through the clause "the first pulsar...was in the summer of 1967"; the construction of this clause leads to an incoherent meaning; the intended meaning is that the first pulsar to be sighted was observed in the summer of 1967 by graduate student Jocelyn Bell. Further, Option A incorrectly uses the past perfect tense verb "had not been announced" to refer to the later of two actions that concluded in the past - the pulsar being discovered and the discovery being announced; please remember, the past perfect tense (marked by the use of helping verb "had") is used when a sentence contains two actions in the past; the helping verb "had" is used with the action in the "greater past". Additionally, Option A suffers from pronoun ambiguity, as the pronoun "it" lacks a clear referent.

B: This answer choice incorrectly uses "Although not announced until February, 1968" to modify "in the summer of 1967 graduate student Jocelyn Bell"; as "in the summer of 1967" is also a modifier, "Although not announced until February, 1968" modifies "graduate student Jocelyn Bell, illogically implying that Jocelyn Bell was not announced until February 1968; the intended meaning is that the Jocelyn Bell's discovery of the pulsar was not announced until February 1968; please remember, in a “phrase + comma + noun” construction, the phrase must correctly modify the noun.

C: This answer choice incorrectly uses "Although observed...1967" to modify "the discovery of the first sighted pulsar", illogically suggesting that the discovery of the pulsar was observed by Jocelynn Bell in the summer of 1967; the intended meaning is that the pulsar itself was observed by Jocelynn Bell in the summer of 1967; please remember, in a “phrase + comma + noun” construction, the phrase must correctly modify the noun. Further, Option C incorrectly uses the past perfect tense verb "had not been announced" to refer to the later of two actions that concluded in the past - the pulsar being discovered and the discovery being announced; please remember, the past perfect tense (marked by the use of helping verb "had") is used when a sentence contains two actions in the past; the helping verb "had" is used with the action in the "greater past".

D: Correct. This answer choice uses the clause "The first pulsar...to be sighted was observed", avoiding the modifier errors seen in Options B and C and conveying the intended meaning - that the first pulsar to be sighted was observed in the summer of 1967 by graduate student Jocelyn Bell, but the discovery was not announced until February 1968. Further, Option D correctly uses the simple past tense verb phrase "was not announced" to refer to the later of two actions that concluded in the past - the pulsar being discovered and the discovery being announced. Additionally, Option D avoids the pronoun error seen in Option A, as it employs no pronouns. Besides, Option D correctly uses "but" to convey contrast.

E: This answer choice alters the meaning of the sentence through the clause "The first sighted pulsar...was not announced until February, 1968"; the construction of this clause illogically suggests that the pulsar itself was not announced until February 1968; the intended meaning is that the discovery of the pulsar was not announced until February 1968. Further, Option E incorrectly uses "while" to illustrate contrast; please remember, “although” and “despite” are used to show contrast, and “while” is used for actions that take place simultaneously, irrespective of whether these actions are positive, negative, or neutral.

Hence, D 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 (~2 minutes):



To understand the concept of "Past Perfect Tense" on GMAT, you may want to watch the following video (~2 minutes):



To understand the concept of "Although", "Though", "Despite", and "While" on GMAT, you may want to watch the following video (~1 minute):



All the best!
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Opted D and E,

but rejected D because of -" to be sighted was observed"

Can any one pls explain
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Mountain14
Opted D and E,

but rejected D because of -" to be sighted was observed"

Can any one pls explain

"To be sighted was observed" is indeed a tricky construction. Remember infinitives can be adverbs, nouns, and adjectives. In this case, the infinitive is used as an adjective to "the first pulsar." The infinitive, like other verbals, carry an idea of action, and the idea of action is that "someone sighted the first pulsar." In passive tense, that is "the first pulsar was sighted by someone"; without the agent, it is "the first pulsar was sighted"; in infinitive-modifier form, we have "the first pulsar to be sighted." So, the blurb "the first pulsar to be sighted was observed..." is a bit less confusing once it's broken down.

I hope this helps.
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what is wrong with E please explain ?? :roof

Regards
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smartyguy
what is wrong with E please explain ?? :roof
E says: The first sighted pulsar, or rapidly spinning collapsed star, was not announced until February, 1968, while it was observed in the summer of 1967 by graduate student Jocelyn Bell.

So, it basically says: The first sighted pulsar was not announced until February, 1968

It is nonsensical to say that pulsar was not announced; pulsar cannot be announced/unannounced.

Actually the observation/discovery (about the sighting of pulsar) was not announced until February, 1968. This is what E says.
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In the option c, is it not correct to use ' had not been announced before/until 1968' ? because to emphasize that ' announcement' has not been made before 1968. 'no announcement' is before 1968 so i thought it should be past perfect tense. i understand first sighting in 1967 and then announcement in 1968 . so, use of past perfect for announcement is wrong. but, without the first clause is it right to use past perfect for the second clause?
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In the option c, is it not correct to use ' had not been announced before/until 1968' ? because to emphasize that ' announcement' has not been made before 1968. 'no announcement' is before 1968 so i thought it should be past perfect tense. i understand first sighting in 1967 and then announcement in 1968 . so, use of past perfect for announcement is wrong. but, without the first clause is it right to use past perfect for the second clause?

Use of past perfect is redundant when using "before".
Correct: I left home before my father arrived.
Wrong: I had left home before my father arrived.

The following is an excerpt from Manhattan SC guide:

"Note that we do not always use the Past Perfect for earlier actions. In general, you should use Past Perfect only to clarify or emphasize a sequence of past events. The earlier event should somehow have a bearing on the context of the later event. Moreover, if the sequence is already obvious, we often do not need Past Perfect.

Laura LOCKED the deadbolt before she LEFT for work."
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'To be sighted' and 'was observed' are they not redundant in option D ? or do they take different stance here ? Why not simply say 'was observed'
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'To be sighted' and 'was observed' are they not redundant in option D ? or do they take different stance here ? Why not simply say 'was observed'

They can't be redundant. The sentence focuses on the time of the observation of the first special star that was sighted. "To be sighted" means the first one was sighted from the Earth. "was observed" is simply the main verb in that sentence.

Also, if you combine them: "The first pulsar was observed in the summer of 1967", this sentence distorts the meaning. First, "the first pulsar" means first of what? Second, this sentence indicates that people observed that star in 1967, this observation is not necessarily the first observation of that star.
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(A) Although the first pulsar, or rapidly spinning collapsed star, to be sighted was in the summer of 1967 by graduate student Jocelyn Bell, it had not been announced until February, 1968. - 'it' refers to the 'first pulsar', resulting in an illogical meaning. Also, there is an issue with the tenses. The earlier event has a simple past tense but the later event has a past perfect tense.

(B) Although not announced until February, 1968, in the summer of 1967 graduate student Jocelyn Bell observed the first pulsar, or rapidly spinning collapsed star, to be sighted. - Modifier error.

(C) Although observed by graduate student Jocelyn Bell in the summer of 1967, the discovery of the first sighted pulsar, or rapidly spinning collapsed star, had not been announced before February, 1968. - Same as B.

(D) The first pulsar, or rapidly spinning collapsed star, to be sighted was observed in the summer of 1967 by graduate student Jocelyn Bell, but the discovery was not announced until February, 1968. - Correct.

(E) The first sighted pulsar, or rapidly spinning collapsed star, was not announced until February, 1968, while it was observed in the summer of 1967 by graduate student Jocelyn Bell. - 'while' creates a meaning issue.

Answer: D
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I have a question, in answer choice d, isn't "sighted was observed " redundant?@
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'To be sighted was observed' does sound redundant actually. GMATNinja, could you please explain that?
But nevertheless, D sounds better than the other choices, so would go with that!
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nithinjohn
'To be sighted was observed' does sound redundant actually. GMATNinja, could you please explain that?
But nevertheless, D sounds better than the other choices, so would go with that!

Do not agree.

The first pulsar to be sighted was observed.

"the first to be sighted" is an attribute of this pulsar. it was the first pulsar that somebody has been seen.
And then we say that it was observed. In some year, by some guy and so on.
So no redundancy.
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Samakshkapoor92
GMATNinja
I have a question, in answer choice d, isn't "sighted was observed " redundant?
nithinjohn
'To be sighted was observed' does sound redundant actually. GMATNinja, could you please explain that?
But nevertheless, D sounds better than the other choices, so would go with that!
Sorry for the wait on the OE, Samakshkapoor92 & nithinjohn! I think the potential redundancy is actually the hardest thing about this question, and I say quite a bit about it in the explanation. Though DharLog is spot-on, and beat me to it. :)

Welcome to GMAT Club, Samakshkapoor92!
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GMATNinja


The use of the past perfect tense (“had not been announced”) also isn’t great in (A). That verb tense needs to describe an action that happens BEFORE some other action in the past. But in this case, it’s backwards: the pulsar was observed in 1967, but then it was announced later, in 1968 – so it’s awfully strange to use the past perfect tense to discuss the 1968 announcement, given the context of the sentence.


Dear @GMATNinja,mikemcgarry, GMATNinjaTwo, GMATNinja, MagooshExpert Carolyn,
sayantanc2
VeritasPrepKarishma

I genuinely need you experts' help

verb tens is so hard for foreigners.

As GMATNinja explains above, I think I can understand what your point.
but, I am still confused.

I read a correct example from Manhattan guide,
Quote:

The band U2 WAS just one of many new groups on the rock music scene in the early 1980s, but less than ten years later, U2 HAD fully ECLIPSED its early rival in the pantheon of popular music.

my interpretation of HAD fully ECLIPSED is the timeframeless than ten years later,
more important point of this sentence is that a past perfect HAD fully ECLIPSED is not earlier action in the sentence,

similarly, in this case, I think HAD not BEEN ANNOUNCED is not a earlier action although HAD fully ECLIPSED is correct because the timeframe "UNTIL FEBRUARY 1968",
So I think the meaning is sound.

please help explain further.

Thanks in advance

have a lovely day.

>_~
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zoezhuyan
GMATNinja


The use of the past perfect tense (“had not been announced”) also isn’t great in (A). That verb tense needs to describe an action that happens BEFORE some other action in the past. But in this case, it’s backwards: the pulsar was observed in 1967, but then it was announced later, in 1968 – so it’s awfully strange to use the past perfect tense to discuss the 1968 announcement, given the context of the sentence.


Dear @GMATNinja,mikemcgarry, GMATNinjaTwo, GMATNinja, MagooshExpert Carolyn,
sayantanc2
VeritasPrepKarishma

I genuinely need you experts' help

verb tens is so hard for foreigners.

As GMATNinja explains above, I think I can understand what your point.
but, I am still confused.

I read a correct example from Manhattan guide,
Quote:

The band U2 WAS just one of many new groups on the rock music scene in the early 1980s, but less than ten years later, U2 HAD fully ECLIPSED its early rival in the pantheon of popular music.

my interpretation of HAD fully ECLIPSED is the timeframeless than ten years later,
more important point of this sentence is that a past perfect HAD fully ECLIPSED is not earlier action in the sentence,

similarly, in this case, I think HAD not BEEN ANNOUNCED is not a earlier action although HAD fully ECLIPSED is correct because the timeframe "UNTIL FEBRUARY 1968",
So I think the meaning is sound.
First, you want to be very, very careful about interpreting a non-official sentence as an authoritative representation of how the GMAT handles a certain concept. If you want to analyze official GMAT sentences in an effort to figure out how, exactly, the GMAT handles the past perfect tense, that would be fine. But I think it's a mistake to assume that questions written by a test-prep company (my own included!) -- perfectly mimic the GMAT's handling of any particular grammar issue.

In other words: official GMAT sentences are a good authority on the GMAT's usage of past perfect tense; non-official sentences are not.

So I won't analyze the U2 example, but let's get back to the original sentence:

Quote:
Although the first pulsar... to be sighted was in the summer of 1967 by graduate student Jocelyn Bell, it had not been announced until February, 1968.
I think that part of the confusion is that the action in past perfect ("had not been announced") isn't really an action at all -- it's the absence of any action, since the discovery "had NOT been announced". But still, the sentence is very clearly trying to draw a distinction between two time periods: in 1967 (the earlier period), the discovery was made, and in 1968 (the later period) the discovery was announced. And it's just nonsensical to use past perfect to describe what happened -- or didn't happen -- in the LATER period (1968).

And even if you don't believe a word of that, there are still plenty of other reasons to eliminate (A). :)

I hope this helps!
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zoezhuyan
GMATNinja


The use of the past perfect tense (“had not been announced”) also isn’t great in (A). That verb tense needs to describe an action that happens BEFORE some other action in the past. But in this case, it’s backwards: the pulsar was observed in 1967, but then it was announced later, in 1968 – so it’s awfully strange to use the past perfect tense to discuss the 1968 announcement, given the context of the sentence.

I genuinely need you experts' help

verb tens is so hard for foreigners.

As GMATNinja explains above, I think I can understand what your point.
but, I am still confused.

I read a correct example from Manhattan guide,
Quote:

The band U2 WAS just one of many new groups on the rock music scene in the early 1980s, but less than ten years later, U2 HAD fully ECLIPSED its early rival in the pantheon of popular music.

my interpretation of HAD fully ECLIPSED is the timeframeless than ten years later,
more important point of this sentence is that a past perfect HAD fully ECLIPSED is not earlier action in the sentence,

similarly, in this case, I think HAD not BEEN ANNOUNCED is not a earlier action although HAD fully ECLIPSED is correct because the timeframe "UNTIL FEBRUARY 1968",
So I think the meaning is sound.

please help explain further.

Thanks in advance

have a lovely day.

>_~
In the sentence about U2, "had fully eclipsed" is an earlier action. What is it earlier than? "less than ten years later."

Consider the following alternative, which also has an action occurring before ten years later.

    By the 1990's, the band had eclipsed its earlier rivals.

Now, the action the band's eclipsing its rivals precedes the 1990's.
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