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655-705 (Hard)|   Modifiers|   Modifiers|   Parallelism|   Pronouns|                        
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DmitryFarber
unraveled The trouble is that you are using grammar rules to demonstrate that the sentence can be read as a grammatical English sentence (it can!) without considering the author's intended meaning. We don't have to go to the second meaning you suggest to see that E doesn't give us what we want. Take a look at my post on the previous page to see my take on the meaning troubles that E produces. They are a bit subtle, and not so outrageous as saying that a person is in a book, but they are still problematic enough to make E invalid.

Yes I had gone through those three posts before posting my query. I hope you are referring to the highlighted one.
*Noted your point about grammar rules. I made them just to make my query clear enough as I was trying to understand the meaning by understanding the sentence structure.

DmitryFarber
It's quite normal for a noun modifier to apply to an entire noun phrase, rather than just the last noun in the phrase, as long as the meaning is clear and unambiguous. This can include skipping over a prepositional modifier to apply to the preceding noun. In this case, we can be certain that electric current wasn't first made in 1845, so there's no danger of misunderstanding.

Hmm, I wouldn't call that a rule at all--it's a tendency that one observer has noted. There are many cases in which I wouldn't expect to see this followed with "that." A simpler rule of thumb is that we should repeat "that" (or "which," or any other structuring word) when needed to clarify the meaning. So no, I wouldn't expect this to hold with B or even E. We could say "which was X and is Y" as long as our intended meaning is clear. However, we'd need a justification for the shift in tense (do I really need the "was"?) and we would of course have to ditch "it" to have parallel verbs.

What stands out to me most about E is how badly it garbles the meaning. First, the restrictive modifier (that) makes it appear that we are trying to narrow down which SET of Kirchoff's laws we are dealing with: "one of K's laws THAT was an observation." Even if it turns out that K had many such observations among his laws, there's no reason to contrast these from any others right now. Then we have the odd use of commas to set off "first made in 1845" from the rest. This sounds like the "first" is going to be contrasted with some later action, but then all we get is "and is now included," which would have to be parallel with the earlier "was an observation." As we've gotten into above, this doesn't work here, even if there's no blanket rule about switching tenses, but even if it worked perfectly, it would leave that "first made" modifier hanging by itself to no purpose.

DmitryFarber
Since the meaning of the sentence could be anything, I weighed A and E equally.
Okay, for cleanliness(sentence structure and projected meaning) I can vote A over E but meaning-wise I can't weigh one over the other - reference of 'observations..electric current' to specific K's laws using 'that' in E OVER reference of patent to K's laws in A OR vice-a-versa.
Also, I can't simply eliminate E for it's restrictive nature wherein I'm not sure whether the meaning using 'that' is superior/inferior to A. If it's about questioning why that meaning, I can do that to both A and E.

OR
Is it that since no reference to specific patent is made in the non-underlined part that we can't refer to specific K's laws.?? If that's so - its would be outrageous - it becomes easier to cross out E and select A, not to mention, the clumsiness, thus meaning, of E as you have pointed out.
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(A) laws, an observation about electric current first made in 1845 and
The biggest thing that jumps out at me here is the word "and." Something has to be parallel with the phrase that follows the word "and." And I think we're in good shape: "... one of Kirchhoff's laws, an observation about electric current first made in 1845 and now included in virtually every textbook of elementary physics." Cool, "first made in 1845" and "now included in virtually every textbook" both modify "an observation about electric current" -- and that makes perfect sense.

So let's keep (A).

GMATNinja
Couple of questions here
1. The phrase an observation about electric current first made in 1845, here is it the observation that was made in 1845 or the current that was made in 1845 ? Isn't there an ambiguity here ? May be current is not made but generated !! :dazed
2. Regarding the parallel phrases which are modifying one of Kirchoff's laws -> Isn't it the case that both the phrases independently modify the noun one of Kirchoff's laws? Rather both first made in 1845 and now included.... modifying an observation about electric current ?
One of Kirchoff's laws
->The law is an observation about electric current first made in 1845
->The law is is now included in virtually every textbook of elementary physics.

Please correct me if I am totally screwing here
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unraveled Again, be careful with this approach. You're looking at this from an objective, scientific standpoint and saying "Can this answer choice mean something that makes sense? Do I know for a fact which version is right?" That stance is going to break down on a lot of these questions. Although it's true that A has no monopoly on meaning, we can still ask some important questions:

1) Looking at an individual answer choice, can I tell what the author is trying to say? Does the idea make sense? (This can be hard to do, and sometimes what makes a problem hard is that an answer choice like E here doesn't stand out as particularly wrong to some readers.)
2) Looking at ALL 5 answer choices as a whole, what meaning does the author seem to be trying to convey? Does this answer choice fit with that intent? This stance can really help when we have competing meanings to deal with, and it can also help us to select the best structure of tense, modifiers, etc. to convey the meaning at hand.
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B states that laws which was an observation; laws is plural and was is singular . Secondly, the pronoun it has no antecedent. Does it refer to the observation or one of the laws or the patent or what? Therefore B is ruled out
why which cannot refer to "one of kirchoff's laws"?
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"Which" usually modifies the preceding noun, so that would be "laws" here. We certainly could read "which" in B as modifying the whole preceding noun phrase: "one of K's laws." After all, that's what the modifier in A does. However, then we'd still be stuck with an answer that isn't parallel: which WAS and IT IS. The "it" only works if we had a subject before the first verb (was), and not just the relative pronoun "which."
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GMATNinja
Quote:
(A) laws, an observation about electric current first made in 1845 and
The biggest thing that jumps out at me here is the word "and." Something has to be parallel with the phrase that follows the word "and." And I think we're in good shape: "... one of Kirchhoff's laws, an observation about electric current first made in 1845 and now included in virtually every textbook of elementary physics." Cool, "first made in 1845" and "now included in virtually every textbook" both modify "an observation about electric current" -- and that makes perfect sense.

So let's keep (A).

GMATNinja
Couple of questions here
1. The phrase an observation about electric current first made in 1845, here is it the observation that was made in 1845 or the current that was made in 1845 ? Isn't there an ambiguity here ? May be current is not made but generated !! :dazed
2. Regarding the parallel phrases which are modifying one of Kirchoff's laws -> Isn't it the case that both the phrases independently modify the noun one of Kirchoff's laws? Rather both first made in 1845 and now included.... modifying an observation about electric current ?
One of Kirchoff's laws
->The law is an observation about electric current first made in 1845
->The law is is now included in virtually every textbook of elementary physics.

Please correct me if I am totally screwing here
Regarding your second question: after the "and" we have "included," an "-ed" modifier. So it should be parallel to another modifier (i.e. "made"), not a noun (i.e. "observation").

Regarding your first question: yes, technically "first made in 1845" could modify "electric current" or "observation." But notice that we run into this potential problem in ALL five answer choices! So we're stuck with it and don't actually have to worry about whether it's ambiguous.

Also, as explained above, "made" and "included" are parallel in choice (A). So if "first made" modified electric current, that would imply that the electric current is "now included in virtually every textbook of elementary physics" -- and that wouldn't make any sense. And did scientists create some special electric current in 1845 and then continue to study that particular electric current for years to come?

All signs point to the more logical meaning, which is that the observation (about electric current) was first made in 1845.

I hope that helps!
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In 1995 Richard Stallman, a well-known critic of the patent system, testified in Patent Office hearings that, to test the system, a colleague of his had managed to win a patent for one of Kirchhoff's laws, an observation about electric current first made in 1845 and now included in virtually every textbook of elementary physics.


(A) laws, an observation about electric current first made in 1845 and -> "first made" and "now included" are parallel. Let's keep it.

(B) laws, which was an observation about electric current first made in 1845 and it is -> Kirchhoff's las was an observation about electric current....No! we need "Patent".

(C) laws, namely, it was an observation about electric current first made in 1845 and -> two Independent clauses need Conjunction.

(D) laws, an observation about electric current first made in 1845, it is ->Same as C.

(E) laws that was an observation about electric current, first made in 1845, and is -> It is saying, Electric current is first made in 1845...We are talking about a patent ...

So, I think A. :)
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Quote:
The other problem is the placement of the modifier "first made in 1845." This is subtle and annoying, but because "first made in 1845" is surrounded by commas (an appositive phrase, if you like grammar jargon), it seems to modify ONLY the preceding noun, "electric current." So if we think about the sentence strictly and literally, it's saying that electric current was first made in 1845, and that's really not what the sentence is trying to say -- it's trying to say that the observation was first made in 1845, not the electric current itself.

How do we know if in the given sentence the intended reference of "first made in 1845" is for "observation" or "electric current"?

The appositive in the given sentence (or the correct sentence): "an observation about electric current first made in 1845"

"first made in 1845" is immediately following the "electric current". Should "electric current" not be the correct referent for "first made in 1845" as per this?


GMATNinja
Quote:
(A) laws, an observation about electric current first made in 1845 and
The biggest thing that jumps out at me here is the word "and." Something has to be parallel with the phrase that follows the word "and." And I think we're in good shape: "... one of Kirchhoff's laws, an observation about electric current first made in 1845 and now included in virtually every textbook of elementary physics." Cool, "first made in 1845" and "now included in virtually every textbook" both modify "an observation about electric current" -- and that makes perfect sense.

So let's keep (A).

Quote:
(B) laws, which was an observation about electric current first made in 1845 and it is
The "which" jumps out at me first in (B): "which was an observation..." modifies "one of Kirchoff's laws." That's OK, though we probably don't really even need the phrase "which was." It's not a big deal, but (A) is more succinct because it skips those extra couple of words. That's not a definite error, but it's a mild reason to prefer (A) over (B).

The bigger problem is the parallelism. Following the "and", we have a brand-new clause: "it is now included in virtually every textbook..." But I don't think that the clause is logically parallel to anything. And more importantly: there's no good reason to start a brand-new clause here, partly because we're just trying to describe the observation, so a simple modifier would be cleaner than a brand-new clause.

So (B) isn't a complete disaster, but it's definitely not as good as (A).

Quote:
(C) laws, namely, it was an observation about electric current first made in 1845 and
This is a classic comma splice:

  • Independent clause #1: "In 1995 Richard Stallman, a well-known critic of the patent system, testified in Patent Office hearings that, to test the system, a colleague of his had managed to win a patent for one of Kirchhoff's laws..."
  • Independent clause #2: "...it was an observation about electric current first made in 1845 and now included in virtually every textbook of elementary physics."

Those two independent clauses are separated by only a comma, and that's not cool. (Commas and comma splices are very briefly discussed in this YouTube video on GMAT punctuation if you're curious to learn more about that crap.) So we can eliminate (C).

Quote:
(D) laws, an observation about electric current first made in 1845, it is
(D) has basically the same comma splice problem as (C):

  • Independent clause #1: "In 1995 Richard Stallman, a well-known critic of the patent system, testified in Patent Office hearings that, to test the system, a colleague of his had managed to win a patent for one of Kirchhoff's laws..."
  • Independent clause #2: "...it is now included in virtually every textbook of elementary physics."

So (D) is out, too.

Quote:
(E) laws that was an observation about electric current, first made in 1845, and is
(E) isn't a total disaster, but it's definitely not as good as (A).

For starters, I'm not sure why we would say something like "...one of Kirchoff's laws that was an observation about electric current..." First, there's no good reason to emphasize the past tense in this case: sure, the observation was first made in the past, but there's no good reason to suggest that the law itself somehow existed only in the past -- and that's exactly what seems to be happening in (A). Second, the phrase "one of Kirchoff's laws that was an observation about electric current" suggests that Kirchoff had other laws that were NOT about electric current, and we have no idea if that's actually the case.

The other problem is the placement of the modifier "first made in 1845." This is subtle and annoying, but because "first made in 1845" is surrounded by commas (an appositive phrase, if you like grammar jargon), it seems to modify ONLY the preceding noun, "electric current." So if we think about the sentence strictly and literally, it's saying that electric current was first made in 1845, and that's really not what the sentence is trying to say -- it's trying to say that the observation was first made in 1845, not the electric current itself.

So (E) can be eliminated, and (A) is the best we can do.
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Pankaj0901
Quote:
The other problem is the placement of the modifier "first made in 1845." This is subtle and annoying, but because "first made in 1845" is surrounded by commas (an appositive phrase, if you like grammar jargon), it seems to modify ONLY the preceding noun, "electric current." So if we think about the sentence strictly and literally, it's saying that electric current was first made in 1845, and that's really not what the sentence is trying to say -- it's trying to say that the observation was first made in 1845, not the electric current itself.

How do we know if in the given sentence the intended reference of "first made in 1845" is for "observation" or "electric current"?

The appositive in the given sentence (or the correct sentence): "an observation about electric current first made in 1845"

"first made in 1845" is immediately following the "electric current". Should "electric current" not be the correct referent for "first made in 1845" as per this?


GMATNinja
Quote:
(A) laws, an observation about electric current first made in 1845 and
The biggest thing that jumps out at me here is the word "and." Something has to be parallel with the phrase that follows the word "and." And I think we're in good shape: "... one of Kirchhoff's laws, an observation about electric current first made in 1845 and now included in virtually every textbook of elementary physics." Cool, "first made in 1845" and "now included in virtually every textbook" both modify "an observation about electric current" -- and that makes perfect sense.

So let's keep (A).

Quote:
(B) laws, which was an observation about electric current first made in 1845 and it is
The "which" jumps out at me first in (B): "which was an observation..." modifies "one of Kirchoff's laws." That's OK, though we probably don't really even need the phrase "which was." It's not a big deal, but (A) is more succinct because it skips those extra couple of words. That's not a definite error, but it's a mild reason to prefer (A) over (B).

The bigger problem is the parallelism. Following the "and", we have a brand-new clause: "it is now included in virtually every textbook..." But I don't think that the clause is logically parallel to anything. And more importantly: there's no good reason to start a brand-new clause here, partly because we're just trying to describe the observation, so a simple modifier would be cleaner than a brand-new clause.

So (B) isn't a complete disaster, but it's definitely not as good as (A).

Quote:
(C) laws, namely, it was an observation about electric current first made in 1845 and
This is a classic comma splice:

  • Independent clause #1: "In 1995 Richard Stallman, a well-known critic of the patent system, testified in Patent Office hearings that, to test the system, a colleague of his had managed to win a patent for one of Kirchhoff's laws..."
  • Independent clause #2: "...it was an observation about electric current first made in 1845 and now included in virtually every textbook of elementary physics."

Those two independent clauses are separated by only a comma, and that's not cool. (Commas and comma splices are very briefly discussed in this YouTube video on GMAT punctuation if you're curious to learn more about that crap.) So we can eliminate (C).

Quote:
(D) laws, an observation about electric current first made in 1845, it is
(D) has basically the same comma splice problem as (C):

  • Independent clause #1: "In 1995 Richard Stallman, a well-known critic of the patent system, testified in Patent Office hearings that, to test the system, a colleague of his had managed to win a patent for one of Kirchhoff's laws..."
  • Independent clause #2: "...it is now included in virtually every textbook of elementary physics."

So (D) is out, too.

Quote:
(E) laws that was an observation about electric current, first made in 1845, and is
(E) isn't a total disaster, but it's definitely not as good as (A).

For starters, I'm not sure why we would say something like "...one of Kirchoff's laws that was an observation about electric current..." First, there's no good reason to emphasize the past tense in this case: sure, the observation was first made in the past, but there's no good reason to suggest that the law itself somehow existed only in the past -- and that's exactly what seems to be happening in (A). Second, the phrase "one of Kirchoff's laws that was an observation about electric current" suggests that Kirchoff had other laws that were NOT about electric current, and we have no idea if that's actually the case.

The other problem is the placement of the modifier "first made in 1845." This is subtle and annoying, but because "first made in 1845" is surrounded by commas (an appositive phrase, if you like grammar jargon), it seems to modify ONLY the preceding noun, "electric current." So if we think about the sentence strictly and literally, it's saying that electric current was first made in 1845, and that's really not what the sentence is trying to say -- it's trying to say that the observation was first made in 1845, not the electric current itself.

So (E) can be eliminated, and (A) is the best we can do.

Pankaj0901, "first made in 1845" is modifying the entire noun phrase "an observation about electric current". Also, it doesn't make sense to say that electric current was made. as it is a natural phenomenon and it would make more sense to say that it was first discovered in 1845. But obviously, the discovery of electric current isn't the point of discussion here.
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Thank you Brian123. I think I got your point. But just to confirm:

(A) laws, an observation about electric current first made in 1845 and
Here, "first made in 1845" modifies "observation"
And, thus it is correct.

(E) laws that was an observation about electric current, first made in 1845, and is
Here, "first made in 1845" modifies "electric current".
And, thus it is incorrect.

My takeaway: When a modifier is separated by comma (as in Option E), the modifier always modifies the immediate preceding noun. Whereas, when there is no comma (as in Option A), it can modify a noun need not necessarily be immediately preceding to it. Hope my understanding is correct here?
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Pankaj0901
Thank you Brian123. I think I got your point. But just to confirm:

(A) laws, an observation about electric current first made in 1845 and
Here, "first made in 1845" modifies "observation"
And, thus it is correct.

(E) laws that was an observation about electric current, first made in 1845, and is
Here, "first made in 1845" modifies "electric current".
And, thus it is incorrect.

My takeaway: When a modifier is separated by comma (as in Option E), the modifier always modifies the immediate preceding noun. Whereas, when there is no comma (as in Option A), it can modify a noun need not necessarily be immediately preceding to it. Hope my understanding is correct here?

before Brian123 replies, Here is my view point:

You are going in dangerous territory. There is no absolute such rule. modifers can jump over prepositions.
I went to picks vegetables from Walmart, a place that is well know
I went to picks vegetables from Walmart in XYZ area, a famous supermarket chain

I went to picks vegetables from Walmart that is situated nearby my house
I went to pick vegetables from Walmart that I am going to cook today
you can see from above examples: modifier can jump over prepositions to make a sensical meaning



See below sentences:
I went to buy vegetables from area that I like
like what? area or vegetables? to understand the meaning I need to read the context or check other option that clears this ambiguity
I went to buy vegetables from area which I like--> ok means area--no ambiguity


Key Point is: look for strong reasons( core grammatically rules : SV pair etc. , clear meaning ) to reject or accept the option. The rule that you defined is in grey zone.

For this particular SC, the core is with what comes after laws: comma or which or another sentence.
After you shortlist , then you need to choose best .it maybe possible that 2 options are grammatically correct but one is better over other in meaning concise

I hope it is helpful.
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GMATNinja
Quote:


Quote:
(E) laws that was an observation about electric current, first made in 1845, and is
(E) isn't a total disaster, but it's definitely not as good as (A).

For starters, I'm not sure why we would say something like "...one of Kirchoff's laws that was an observation about electric current..." First, there's no good reason to emphasize the past tense in this case: sure, the observation was first made in the past, but there's no good reason to suggest that the law itself somehow existed only in the past -- and that's exactly what seems to be happening in (A). Second, the phrase "one of Kirchoff's laws that was an observation about electric current" suggests that Kirchoff had other laws that were NOT about electric current, and we have no idea if that's actually the case.

The other problem is the placement of the modifier "first made in 1845." This is subtle and annoying, but because "first made in 1845" is surrounded by commas (an appositive phrase, if you like grammar jargon), it seems to modify ONLY the preceding noun, "electric current." So if we think about the sentence strictly and literally, it's saying that electric current was first made in 1845, and that's really not what the sentence is trying to say -- it's trying to say that the observation was first made in 1845, not the electric current itself.

So (E) can be eliminated, and (A) is the best we can do.


Hello GMATNinja, EXPERTS

Thanks for the explanation.

Question - Can we eliminate options B and C just because of their emphasis on the past tense -was- similar to what you have mentioned for option E?
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NischalSR
Hello GMATNinja, EXPERTS

Thanks for the explanation.

Question - Can we eliminate options B and C just because of their emphasis on the past tense -was- similar to what you have mentioned for option E?
That does give us another vote against (B) and (C), in addition to the other (stronger) reasons mentioned in our original explanation.

To be clear, the "emphasis on the past tense" stuff, on its own, probably isn't enough to make (B), (C), or (E) flat-out WRONG, exactly. (Again, your job is to pick the BEST available option, not to look at each sentence in a bubble and say whether it's wrong or right.) But when we combine the past tense stuff with all of the other points mentioned, we see that (A) is the BEST choice.

I hope that helps!
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Quote:
(A) laws, an observation about electric current first made in 1845 and
The biggest thing that jumps out at me here is the word "and." Something has to be parallel with the phrase that follows the word "and." And I think we're in good shape: "... one of Kirchhoff's laws, an observation about electric current first made in 1845 and now included in virtually every textbook of elementary physics." Cool, "first made in 1845" and "now included in virtually every textbook" both modify "an observation about electric current" -- and that makes perfect sense.

So let's keep (A).

Quote:
(B) laws, which was an observation about electric current first made in 1845 and it is
The "which" jumps out at me first in (B): "which was an observation..." modifies "one of Kirchoff's laws." That's OK, though we probably don't really even need the phrase "which was." It's not a big deal, but (A) is more succinct because it skips those extra couple of words. That's not a definite error, but it's a mild reason to prefer (A) over (B).

The bigger problem is the parallelism. Following the "and", we have a brand-new clause: "it is now included in virtually every textbook..." But I don't think that the clause is logically parallel to anything. And more importantly: there's no good reason to start a brand-new clause here, partly because we're just trying to describe the observation, so a simple modifier would be cleaner than a brand-new clause.

So (B) isn't a complete disaster, but it's definitely not as good as (A).

Quote:
(C) laws, namely, it was an observation about electric current first made in 1845 and
This is a classic comma splice:

  • Independent clause #1: "In 1995 Richard Stallman, a well-known critic of the patent system, testified in Patent Office hearings that, to test the system, a colleague of his had managed to win a patent for one of Kirchhoff's laws..."
  • Independent clause #2: "...it was an observation about electric current first made in 1845 and now included in virtually every textbook of elementary physics."

Those two independent clauses are separated by only a comma, and that's not cool. (Commas and comma splices are very briefly discussed in this YouTube video on GMAT punctuation if you're curious to learn more about that crap.) So we can eliminate (C).

Quote:
(D) laws, an observation about electric current first made in 1845, it is
(D) has basically the same comma splice problem as (C):

  • Independent clause #1: "In 1995 Richard Stallman, a well-known critic of the patent system, testified in Patent Office hearings that, to test the system, a colleague of his had managed to win a patent for one of Kirchhoff's laws..."
  • Independent clause #2: "...it is now included in virtually every textbook of elementary physics."

So (D) is out, too.

Quote:
(E) laws that was an observation about electric current, first made in 1845, and is
(E) isn't a total disaster, but it's definitely not as good as (A).

For starters, I'm not sure why we would say something like "...one of Kirchoff's laws that was an observation about electric current..." First, there's no good reason to emphasize the past tense in this case: sure, the observation was first made in the past, but there's no good reason to suggest that the law itself somehow existed only in the past -- and that's exactly what seems to be happening in (A). Second, the phrase "one of Kirchoff's laws that was an observation about electric current" suggests that Kirchoff had other laws that were NOT about electric current, and we have no idea if that's actually the case.

The other problem is the placement of the modifier "first made in 1845." This is subtle and annoying, but because "first made in 1845" is surrounded by commas (an appositive phrase, if you like grammar jargon), it seems to modify ONLY the preceding noun, "electric current." So if we think about the sentence strictly and literally, it's saying that electric current was first made in 1845, and that's really not what the sentence is trying to say -- it's trying to say that the observation was first made in 1845, not the electric current itself.

So (E) can be eliminated, and (A) is the best we can do.

GMATNinja

I am not sure I understand why D is wrong . . . could you please clarify?!
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sbolipombo

GMATNinja

I am not sure I understand why D is wrong . . . could you please clarify?!
(D) contains a comma splice, meaning that it joins together two independent clauses without a conjunction, such as "and." A simple example:

    Tim is jerk, he sometimes cuts off the heads of his children's dolls.


Notice both "Tim is a jerk" and "he sometimes cuts off the heads of his children's dolls" can stand on their own as complete sentences. So we need a conjunction or a semicolon to connect them.

(D) does the same thing, but it's harder to see it, since there are several long modifiers thrown in. Take another look:

Quote:
In 1995 Richard Stallman testified in Patent Office hearings that, to test the system, a colleague of his had managed to win a patent for one of Kirchhoff's laws, an observation about electric current first made in 1845, it is now included in virtually every textbook of elementary physics.
Notice that the portions in red are both independent clauses. Each can stand on its own as a complete sentence. Because we don't have a conjunction to connect them, it's a comma splice, and therefore incorrect.

I hope that clears things up!
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GMATNinja

I was skeptical with option A because of the phrase 'and now included in virtually every textbook of elementary physics.'


I was searching for the option that contains and "is" now included.... as now (meaning present) and included (past tense).

Where did I go wrong here?
I am unable to justify that a past tense is used for the word "now".

Request to give some insights.
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rsrighosh
GMATNinja

I was skeptical with option A because of the phrase 'and now included in virtually every textbook of elementary physics.'


I was searching for the option that contains and "is" now included.... as now (meaning present) and included (past tense).

Where did I go wrong here?
I am unable to justify that a past tense is used for the word "now".

Request to give some insights.
Hi rsrighosh,

Made and included may look like complete verbs, but they're actually participle modifiers.

1. an observation about electric current (a) first made in 1845 and (b) now included in virtually every textbook of elementary physics ← The observation doesn't make anything. It gets "made". This tells us that we're dealing not with complete verbs but with participles (verb forms).

Made and included are both used as a shorter way to introduce a relative clause (a descriptive element often headed by that). These modifiers also don't carry a tense (which is a property of complete verbs) of their own. That is, with such modifiers, we don't have a sure way to know the tense of the verb being replaced. For example, depending on the context, "a phone made by Apple" could be read as "a phone that is made by Apple", or it could be read as "a phone that was made by Apple". The important thing to remember here is that made, without a helping verb like is or was before it, isn't a complete verb.

So the made and included that we see in (1) are meant to be read like this:

2. an observation about electric current (a) that was first made in 1845 and (b) is now included in virtually every textbook of elementary physics

If we use verbs in (2), without that, we'll end up with a comma splice error. A comma splice occurs when independent clauses (subject-verb combinations that can stand alone) are joined using nothing but a comma.

3. Richard Stallman testified that a colleague of his had managed to win a patent for one of Kirchhoff's laws, an observation about electric current was first made in 1845 and is now included in virtually every textbook of elementary physics. ← Both the underlined portions are independent clauses, and they have only a comma between them. This is incorrect on the GMAT.
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