GWD17 一道逻辑求解

穆汐寒

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 are 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 representations 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.
问下C和E，E取非之后为什么是削弱的？

穆汐寒

RRZZR 发表于 2017-3-8 11:12
哥们硬要negate那就negate一下。。

C： No motifs appear in the Sepphoris mosaics that do not also app ...

谢谢~

穆汐寒

alzn2765 发表于 2017-3-8 09:34
我不明白的是你是否所有assumption题都要用negation test来做？Negation Test就是一个非常水的老师在讲课时 ...

谢谢老师！
不过我如果假设题在两个选项之间纠结徘徊的时候才总是习惯用取非来排除

穆汐寒

lisiberry 发表于 2017-3-8 02:16
Hi 我记得前两天解答过这道题，可能解释的不太明白，再细致地说一下。

论述：马赛克上的动物不是当地的动 ...

嗯嗯嗯，明白了！
谢谢！

RRZZR

哥们硬要negate那就negate一下。。

C： No motifs appear in the Sepphoris mosaics that do not also appear in the mosaics of some other Roman city.
At least one motif appear in the Sepphoris mosaics that do not appear in the mosaics of some other Roman city. 至少有一个出现在Sepphoris的motif 没有出现在 众多罗马城市中的几个里

E.        There was not a common repertory of mosaic designs with which artisans who lived in various parts of the Roman Empire were familiar.
There was a common repertory of mosaic designs with which artisans who lived in various parts of the Roman Empire were familiar.
解释如上两位说的。

alzn2765

我不明白的是你是否所有assumption题都要用negation test来做？Negation Test就是一个非常水的老师在讲课时想不出来怎么解释“为什么某个选项是错误的”的时候，想出来的办法。他在想办法解释为什么错误选项错误，你自己想想之所以可以这么做的前提是什么？这个前提你考试的时候是否具备？

这题作者就是做了一个assumption: A没有，B有，A一定是跟B学的。

A一定是跟B学的 等价于 A一定不是跟非B学的

E. There was not a common repertory of mosaic designs with which artisans who lived in various parts of the Roman Empire were familiar.

lisiberry

Hi 我记得前两天解答过这道题，可能解释的不太明白，再细致地说一下。

论述：马赛克上的动物不是当地的动物，因此这些马赛克很有可能是旅途艺术家画的。
问题：要是上述论述成立，必须哪个选项是前提。

C：没有马赛克上的动物不出现在其他城市的马赛克作品上。--》也就是说同样的动物也出现在其他城市的作品里。--》这句话是不是真的，跟原论述没关系。

E：当时罗马没有这样的动物图鉴，谁都可以看到。--》取非：假如有这样一本图鉴，那么不用旅途艺术家画，只要有这本书谁都可以画。
因此，E取非后破坏了论点。是我们寻找的正确答案。