Dobson: Some historians claim that the people who built a : GMAT Critical Reasoning (CR)
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# Dobson: Some historians claim that the people who built a

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VP
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Dobson: Some historians claim that the people who built a [#permalink]

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14 Jul 2006, 19:55
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Dobson: Some historians claim that the people who built a ring of stones thousands of years ago in Britain were knowledgeable about celestial events. The ground for this claim is that two of the stones determine a line pointing directly to the position of the sun at sunrise at the spring equinox. There are many stones in the ring, however, so the chance that one pair will point in a celestially significant direction is large. Therefore, the people who built the ring were not knowledgeable about celestial events.

Which one of the following is an error of reasoning in Dobson's argument?

A) The failure of cited evidence to establish a statement is taken as evidence that that statement is false.

B) Dobson's conclusion logically contradicts some of the evidence presented in support of it.

C) Statements that absolutely establish Dobson's conclusion are treated as if they merely give some support to that conclusion.

D) Something that is merely a matter of opinion is treated as if it were subject to verification as a matter of fact.

E) Dobson is not a scientist.

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14 Jul 2006, 21:25
Oh boy.. this is tough one for me....

I believe its between A and D. I go for D.
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14 Jul 2006, 21:32
???
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Re: CR: Ring of stones [#permalink]

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15 Jul 2006, 03:05
Is it A.
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15 Jul 2006, 12:03
Some historians claim that the people who built a ring of stones thousands of years ago in Britain were knowledgeable about celestial events. The ground for this claim is that two of the stones determine a line pointing directly to the position of the sun at sunrise at the spring equinox.

Dobson's argument:
There are many stones in the ring, however, so the chance that one pair will point in a celestially significant direction is large. Therefore, the people who built the ring were not knowledgeable about celestial events.

Dobson does not state any specific evidence to prove that the people were not knowledgeable. He does bring a point of the probability, but dos not back it up. I am going with D.
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15 Jul 2006, 17:29
boy did i want it to be A, but I believe acfuture has a good point. I think D is the more compelling answer.
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16 Jul 2006, 01:12
D.....
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16 Jul 2006, 03:42
Had to reread both the passage and answer choices twice. Answer seems to be (D) because the final line seems to drastically change course and use another scientists opinion for a definative fact.

@U2lover : Can I ask where you keep getting these great mindbending CRs? They all seem to be 650+ material.

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Re: CR: Ring of stones [#permalink]

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16 Jul 2006, 05:49
A) The failure of cited evidence to establish a statement is taken as evidence that that statement is false.

B) Dobson's conclusion logically contradicts some of the evidence presented in support of it.

C) Statements that absolutely establish Dobson's conclusion are treated as if they merely give some support to that conclusion.

D) Something that is merely a matter of opinion is treated as if it were subject to verification as a matter of fact. seems the right one

E) Dobson is not a scientist. not relevant
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16 Jul 2006, 08:00
To me the right answer seems to be B.

Quote:
A) The failure of cited evidence to establish a statement is taken as evidence that that statement is false.

B) Dobson's conclusion logically contradicts some of the evidence presented in support of it.

C) Statements that absolutely establish Dobson's conclusion are treated as if they merely give some support to that conclusion.

D) Something that is merely a matter of opinion is treated as if it were subject to verification as a matter of fact.

E) Dobson is not a scientist.

Conclusion of Historians : People were knowledgeable.
Evidence : Two stones were made to point to celestial objects for a scientific reason
Dobson's Conclusion : People were not knowledgeable
Dobson contradicts the evidence by stating that the stones were pointing to celestial objects as a chance, and not based on scientific reasoning.

If this seems absolutely absurd, please ignore
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16 Jul 2006, 09:56
it is 'D'
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16 Jul 2006, 11:55
I think its A. (Though I spent a lot of time thinking it was D)

The question stem mentions that the alignment of the stones is the 'ground for the claim'. I would assume that this means it is evidence for the claim, and not an opinion.

This in itself is enough for me to select A over D.
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Uh uh. I know what you're thinking. "Is the answer A, B, C, D or E?" Well to tell you the truth in all this excitement I kinda lost track myself. But you've gotta ask yourself one question: "Do I feel lucky?" Well, do ya, punk?

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16 Jul 2006, 18:55
OA is A

nice discussion here! I picked D as well
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19 Jul 2006, 14:37
Clearly A.
Definately not D. D is a too narrow.
19 Jul 2006, 14:37
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