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Excavations of the Roman city of Sepphoris have uncovered

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Excavations of the Roman city of Sepphoris have uncovered [#permalink] New post 09 Aug 2012, 02:34
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Excavations of the Roman city of Sepphoris have uncovered numerous detailed mosaics depicting several readily identifiable animal species: a hare, a partridge, and various Mediterranean fish. Oddly, most of the species represented did not live in the Sepphoris region when these mosaics were created. Since identical motifs appear in mosaics found in other Roman cities, however, the mosaics of Sepphoris were very likely created by traveling artisans from some other part of the Roman Empire.

Which of the following is an assumption on which the argument depends?

A. The Sepphoris mosaics are not composed exclusively of types of stones found naturally in the Sepphoris area.
B. There is no single region to which all the species depicted in the Sepphoris mosaics native
C. No motifs appear in the Sepphoris mosaics that do not also appear in the mosaics of some other Roman city
D. All of the animal figures in the Sepphoris mosaics are readily identifiable as representation of known species
E. There was not a common repertory of mosaic designs with which artisans who lived in various parts of the Roman empire were familiar
[Reveal] Spoiler: OA
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Re: GMATPrep CR #26 : need help/explanation [#permalink] New post 09 Aug 2012, 17:32
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naruphanp wrote:
Question 26:
Excavations of the Roman city of Sepphoris have uncovered numerous detailed mosaics depicting several readily identifiable animal species: a hare, a partridge, and various Mediterranean fish. Oddly, most of the species represented did not live in the Sepphoris region when these mosaics were created. Since identical motifs appear in mosaics found in other Roman cities, however, the mosaics of Sepphoris were very likely created by traveling artisans from some other part of the Roman Empire.

Which of the following is an assumption on which the argument depends?

A. The Sepphoris mosaics are not composed exclusively of types of stones found naturally in the Sepphoris area.
B. There is no single region to which all the species depicted in the Sepphoris mosaics native
C. No motifs appear in the Sepphoris mosaics that do not also appear in the mosaics of some other Roman city
D. All of the animal figures in the Sepphoris mosaics are readily identifiable as representation of known species
E. There was not a common repertory of mosaic designs with which artisans who lived in various parts of the Roman empire were familiar


Assumption questions require that you understand the structure of the argument.
Background: Sepphoris has mosiacs with animals
Premise: Species in the mosiacs didn't live in Sepphoris at the time
Premise: Same species were found in mosiacs in other Roman cities
Conclusion: Therefore, mosiacs were created by traveling artisans.

Assumptions fill the gap between premises and the conclusion. In other words, assumptions are those unstated facts that must be true for the conclusion to be true. The conclusion states that mosiacs were created by TRAVELING artisans, so you would have to assume that the RESIDENT artisans don't have knowledge of these non-resident species.

A. Stones are not relevant to the conclusion
B. This answer doesn't address how knowledge of species only got to Sepphoris from traveling artisans
C. Interesting answer choice, but it could support a traveling artisan conclusion or a common knowledgebase of species across all of Rome
D. This runs counter to the conclusion - if the species are known, then any artisan (not necessarily a traveling artisan) could have created the mosaics
E. This option states that there isn't a common knowledgebase of species, which supports the conclusion that only TRAVELING artisans (those who pick up knowledge of species as they travel throughout Rome) could have created the mosaics

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Re: GMATPrep CR #26 : need help/explanation [#permalink] New post 09 Aug 2012, 09:06
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from the MGMAT explanation, what they did was reverse the assumption of E. so if they HAD a common repertory of mosaic designs, this would invalidate the entire argument above. Therefore, E. is an essential assumption for the argument presented.
Hope this helps :)
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Re: Excavations of the Roman city of Sepphoris have uncovered [#permalink] New post 01 Jul 2013, 23:55
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Conclusion --the mosaics of Sepphoris were very likely created by traveling artisans from some other part of the Roman empire.

If we negate E ---We get ---There was a common repertory of mosaic designs with which artisans who lived in various parts of the Roman empire were familiar.

So Sepphoris artist were also familar with how to make mosaic -- so conclusion that traveling artisians created mosaic falls apart.

Sepphoris artist if they knew how to make mosaic --- would have made them.

A. The Sepphoris mosaics are not composed exclusively of types of stones found naturally in teh Sepphoris area ---out of scope-- it does not talk abt who created
B. There is no single region to which all the species depicted in the Sepphoris mosaics are native --out of cope
C. No motifs appear in the Sepphoris mosaics that do not also appear in the mosaics of some other Roman city -out of scope
D. All of the animal figures in the Sepphoris mosiacs are readily identifiable as representation of known species ---out of scope
E. There was not a common repertory of mosaic designs with which artisans who lived in various parts of the Roman empire were familiar===correct
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Re: GMATPrep CR #26 : need help/explanation [#permalink] New post 09 Aug 2012, 08:32
Can anybody explain me how the answer is E?
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Re: GMATPrep CR #26 : need help/explanation [#permalink] New post 09 Aug 2012, 10:51
Basically , the conclusion says that travelling artists created mosaics in different parts of roman city , ie one group of artists did all the work through out Roman cities , so an assumption is there are no other groups in the Roman City. E says the same cause if there is a repository you can have more than one group. Hope it helps

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Re: GMATPrep CR #26 : need help/explanation [#permalink] New post 10 Aug 2012, 04:21
E is correct because it states that the travelling artisans had no other knowledge other than what they know from their place.
This directly supports the conclusion.

Hope it helps!
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Re: Excavations of the Roman city of Sepphoris have uncovered [#permalink] New post 04 Aug 2014, 15:38
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Re: Excavations of the Roman city of Sepphoris have uncovered   [#permalink] 04 Aug 2014, 15:38
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