Frobisher, a sixteenth-century English explorer, had soil : GMAT Critical Reasoning (CR)
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# Frobisher, a sixteenth-century English explorer, had soil

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Manager
Joined: 01 Nov 2007
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07 Jan 2008, 15:11
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Question Stats:

80% (02:01) correct 20% (00:00) wrong based on 12 sessions

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Kodlunarn Island examined for gold content. Because high gold content was reported,
Elizabeth I funded two mining expeditions. Neither expedition found any gold there.
Modern analysis of the island’s soil indicates a very low gold content. Thus the methods
used to determine the gold content of Frobisher’s samples must have been inaccurate.
Which of the following is an assumption on which the argument depends?
A. The gold content of the soil on Kodlunarn Island is much lower today than it was
in the sixteenth century.
B. The two mining expeditions funded by Elizabeth I did not mine the same part of
Kodlunarn Island.
C. The methods used to assess gold content of the soil samples provided by
Frobisher were different from those generally used in the sixteenth century.
D. Frobisher did not have soil samples from any other Canadian island examined for
gold content.
E. Gold was not added to the soil samples collected by Frobisher before the samples
were examined.
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07 Jan 2008, 15:36
1
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JCLEONES wrote:
Kodlunarn Island examined for gold content. Because high gold content was reported,
Elizabeth I funded two mining expeditions. Neither expedition found any gold there.
Modern analysis of the island’s soil indicates a very low gold content. Thus the methods
used to determine the gold content of Frobisher’s samples must have been inaccurate.
Which of the following is an assumption on which the argument depends?
A. The gold content of the soil on Kodlunarn Island is much lower today than it was
in the sixteenth century.
B. The two mining expeditions funded by Elizabeth I did not mine the same part of
Kodlunarn Island.
C. The methods used to assess gold content of the soil samples provided by
Frobisher were different from those generally used in the sixteenth century.
D. Frobisher did not have soil samples from any other Canadian island examined for
gold content.
E. Gold was not added to the soil samples collected by Frobisher before the samples
were examined.

E. This is a very tricky one. (seen this before and had same answer by POE) but looking at it again. E makes a lot of sense. If gold were added then the methods were not inaccurate, but the results were not indicative of the actual content. This is different from accuracy. The methods used could still well have been very accurate in determing the amount of gold (or added gold) there was in the sample. So E is the winner.
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07 Jan 2008, 15:41
why not c?
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08 Jan 2008, 11:30
rafiaiqbal wrote:
why not c?

This is a classic trap in CR. The question asks what is the assumption. An assumption can only lead to the conclusion that is made. The conclusion is that the dude's methods are inaccurate. C talks about the dude was using different methods. If that were the correct assumption, how could one make the conclusion that his methods were inaccurate? The assumption has to solidify the conclusion.

Therefore only E serves this purpose and is correct.
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13 Oct 2015, 23:25
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: Frobisher, a sixteenth-century English explorer, had soil   [#permalink] 13 Oct 2015, 23:25
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