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Archaeologist: A skeleton of a North American mastodon that [#permalink]
 20 Sep 2012, 23:20
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Question Stats:
55% (03:11) correct
45% (01:03) wrong based on 2 sessions
Archaeologist: A skeleton of a North American mastodon that became extinct at the peak of the Ice Age was recently discovered. It contains a human-made projectile dissimilar to any found in that part of Eurasia closest to North America. Thus, since Eurasians did not settle in North America until shortly before the peak of the Ice Age, the first Eurasian settlers in North America probably came from a more distant part of Eurasia. Which one of the following, if true, most seriously weakens the archaeologist’s argument? (A) The projectile found in the mastodon does not resemble any that were used in Eurasia before or during the Ice Age. (B) The people who occupied the Eurasian area closest to North America remained nomadic throughout the Ice Age. (C) The skeleton of a bear from the same place and time as the mastodon skeleton contains a similar projectile. (D) Other North American artifacts from the peak of the Ice Age are similar to ones from the same time found in more distant parts of Eurasia. (E) Climatic conditions in North America just before the Ice Age were more conducive to human habitation than were those in the part of Eurasia closest to North America at that time.
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Last edited by getgyan on 21 Sep 2012, 02:23, edited 1 time in total.
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Re: Archaeologist: A skeleton of a North American [#permalink]
21 Sep 2012, 02:02
(E) is the answer as it weakens the premise " since Eurasians did not settle in North America until shortly before the peak of the Ice Age", by stating that Climate in north america was most suitable for habitation thus eurasians settled there. Thus weakening the conclusion that the projectile did not come from distant past of Eurasia.
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Re: Archaeologist: A skeleton of a North American [#permalink]
21 Sep 2012, 02:09
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To weaken an argument, the answer needs to attack either the conclusion, or one of the premises that is required to reach the conclusion. This is a toughie but here’s my attempt POE: A – The projectile didn’t come from Eurasions, proposing an alternative theory that someone else used it. The implication of this is that it makes the projectile irrelevant to the argument about where the Eurasions came from and the whole argument collapses. That would weaken the argument (but maybe not in the way I thought it was going to) B – Not really relevant as the lifestyle they live doesn’t really matter. Eliminate C – This doesn’t add any new information; we now have 2 animals with a projectile. Doesn’t weaken or strengthen. Eliminate D – This strengthens the argument. Eliminate E – Not sure whether this strengthens or is irrelevant, but either way we can eliminate. What’s the OA? B.
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Director
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Re: Archaeologist: A skeleton of a North American [#permalink]
21 Sep 2012, 02:22
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+1 A It is a weaken type question Premise - Archaeologist: A skeleton of a North American mastodon that became extinct at the peak of the Ice Age was recently discovered. It contains a human-made projectile dissimilar to any found in that part of Eurasia closest to North America. Conclusion - Thus, since Eurasians did not settle in North America until shortly before the peak of the Ice Age, the first Eurasian settlers in North America probably came from a more distant part of Eurasia Anything which weakens the conclusion is our answer. (A) The projectile found in the mastodon does not resemble any that were used in Eurasia before or during the Ice Age. (This is our answer. If the projectile does not resemble any that were used in Eurasia it disconnects the Eurasians from the mastodon thus weakening the conclusion. 
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Re: Archaeologist: A skeleton of a North American [#permalink]
21 Sep 2012, 02:27
Agreed, the trick was to spot that the argument depended on the fact that the projectile was Eurasian. I must admit I went in thinking there was going to be an answer somehow based around the timing of the scenario and that threw me off the scent initially. Good post, whats the source?
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Director
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GMAT 1: 710 Q49 V37
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Re: Archaeologist: A skeleton of a North American [#permalink]
21 Sep 2012, 02:35
Skientist wrote: Agreed, the trick was to spot that the argument depended on the fact that the projectile was Eurasian. I must admit I went in thinking there was going to be an answer somehow based around the timing of the scenario and that threw me off the scent initially.
Good post, whats the source? Yes, the same thing happened to me too and at once I thought B is the answer The source is PSB... I will keep posting Enjoy
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Re: Archaeologist: A skeleton of a North American
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21 Sep 2012, 02:35
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