Well, I don't think travelling artist would carry with them a cart load of stones . . . So if you negate A, it says nothing about who created these mosaics. Premise1: Most of the species represented did not live in the Sepphoris region when these mosaics were created premise2: Identical motifs appear in mosaics found in other Roman cities Conclusion: The mosaics of Sepphoris were very likely created by traveling artisans from some other part of the Roman Empire. Necessary assumption, use negation. If you negate E, you get: There was a common repertory of mosaic designs with which artisans who lived in various parts of the Roman Empire were familiar. If this is true, then those artisans do not need to travel from city to city in order to learn the common designs. Therefore, the argument falls apart. So E is necessary for the argument to hold. -- by 会员 sdcar2010 (2011/6/25 10:54:18)
common design??这个并没有提到呀。为什么不用学common design就不用travel to M |