Lines can be parallel in a Euclidean system of geometry. But : GMAT Critical Reasoning (CR)
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# Lines can be parallel in a Euclidean system of geometry. But

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Lines can be parallel in a Euclidean system of geometry. But [#permalink]

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06 Sep 2006, 10:37
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Lines can be parallel in a Euclidean system of geometry. But the non-Euclidean system of geometry that has the most empirical verification is regarded by several prominent physicists as correctly describing the universe we inhabit. If these physicists are right, in our universe there are no parallel lines.

Which one of the following is an assumption that is required by the argument?

(A) There are no parallel lines in the non-Euclidean system of geometry that has the most empirical verification.

(B) Most physicists have not doubted the view that the universe is correctly described by the non-Euclidean system of geometry that has the most empirical verification.

(C) There are no parallel lines in every non-Euclidean system of geometry that has any empirical verification.

(D) The universe is correctly described by the non-Euclidean system of geometry that has the most empirical verification if prominent physicists maintain that it is.

(E) Only physicists who are not prominent doubt the view that the universe is correctly described the non-Euclidean system of geometry that has the most empirical verification.
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06 Sep 2006, 10:47
Hey gmacvik, welcome back buddy.

Your questions are really good, including this one. Most of questions you posted are there in my review logs.

Coming to the this question, I think it is C.
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06 Sep 2006, 10:55
(A) There are no parallel lines in the non-Euclidean system of geometry that has the most empirical verification.

If we negate A... i.e there are parallel lines in the non-ESG, then the argument falls apart.

If there are parallel lines in non-ESG then the assertion that the universe has no parallel lines is not true as we can prove in non-ESG that there can be parallel lines.
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06 Sep 2006, 11:02
Hi PS_Dahiya,
Yes I am back after a gap of a few months. Although I was always tracking this forum. I was really disappointed to see your score, and always felt that you deserved more than you got...

Anyways, coming to this problem, your answer is not correct
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06 Sep 2006, 11:21
haas_mba07 wrote:
(A) There are no parallel lines in the non-Euclidean system of geometry that has the most empirical verification.

If we negate A... i.e there are parallel lines in the non-ESG, then the argument falls apart.

If there are parallel lines in non-ESG then the assertion that the universe has no parallel lines is not true as we can prove in non-ESG that there can be parallel lines.

Ditto
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06 Sep 2006, 20:11
D...?
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06 Sep 2006, 20:20
gmacvik wrote:
Lines can be parallel in a Euclidean system of geometry. But the non-Euclidean system of geometry that has the most empirical verification is regarded by several prominent physicists as correctly describing the universe we inhabit. If these physicists are right, in our universe there are no parallel lines.

Which one of the following is an assumption that is required by the argument?

(A) There are no parallel lines in the non-Euclidean system of geometry that has the most empirical verification.

(B) Most physicists have not doubted the view that the universe is correctly described by the non-Euclidean system of geometry that has the most empirical verification.

(C) There are no parallel lines in every non-Euclidean system of geometry that has any empirical verification.

(D) The universe is correctly described by the non-Euclidean system of geometry that has the most empirical verification if prominent physicists maintain that it is.

(E) Only physicists who are not prominent doubt the view that the universe is correctly described the non-Euclidean system of geometry that has the most empirical verification.

Choice comes to A and C.

Any in C cannot be defended..so A
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07 Sep 2006, 00:03
Is it A or C?
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07 Sep 2006, 00:40
Yup should be A here...

It is down to A(most) and C(any)...

Now the passage talks about most and not any, which goes a bit beyond the argument...
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07 Sep 2006, 00:48
A for me

The passage is assuming that there are no parallel lines in the non-Euclidean system of geometry that has the most empirical verification.

(A) There are no parallel lines in the non-Euclidean system of geometry that has the most empirical verification.

(B) Most physicists have not doubted the view that the universe is correctly described by the non-Euclidean system of geometry that has the most empirical verification. discard due to If these physicists are right

(C) There are no parallel lines in every non-Euclidean system of geometry that has any empirical verification. we are talking about 1 non Euc that has the most verification not all of them with verification.

(D) The universe is correctly described by the non-Euclidean system of geometry that has the most empirical verification if prominent physicists maintain that it is. discard due to If these physicists are right

(E) Only physicists who are not prominent doubt the view that the universe is correctly described the non-Euclidean system of geometry that has the most empirical verification. discard due to If these physicists are right
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07 Sep 2006, 03:11
A.

not C because we don't need and we dont know that is the case for every non-euclidian systems with any verification.
A is sufficient as assumption to get to the conclusion.
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08 Sep 2006, 00:56
(A) is the only answer choice that links the premise to the conclusion.
(even though I don't fully understand what the heck a non-euclidian geometric system is. )
08 Sep 2006, 00:56
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# Lines can be parallel in a Euclidean system of geometry. But

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