一道逻辑题GWD-TN3-3

socool1990

The average hourly wage of television assemblers in Vernland has long been significantly lower than that in neighboring Borodia.  Since Borodia dropped all tariffs on Vernlandian televisions three years ago, the number of televisions sold annually in Borodia has not changed.  However, recent statistics show a drop in the number of television assemblers in Borodia.  Therefore, updated trade statistics will probably indicate that the number of televisions Borodia imports annually from Vernland has increased.



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



A. The number of television assemblers in Vernland has increased by at least as much as the number of television assemblers in Borodia has decreased.

B. Televisions assembled in Vernland have features that televisions assembled in Borodia do not have.

C. The average number of hours it takes a Borodian television assembler to assemble a television has not decreased significantly during the past three years.

D. The number of televisions assembled annually in Vernland has increased significantly during the past three years.

E. The difference between the hourly wage of television assemblers in Vernland and the hourly wage of television assemblers in Borodia is likely to decrease in the next few years.

我咋想不通呢？指点一下

swlfxer

Premise: Televisions are made in both V and B, and B imports TV from V.  The number of televisions sold in B keeps constant.  These TV's come from both B and V. the number of TV assemblers in B decreases.

Conclusion: TV imports from V to B has increased.

The assumption is that if TV assemblers in B are fewer, there will be fewer TV made in B.  A further assumption is that the efficiency of TV assemblers in B has not changed (answer C).

If you use negation method, you would find that after negating C, the argument falls apart. If assemblers in B become more efficient, they can produce the same amount or more TV than before, even with a lower number of total assemblers.

Wangycbest

#sold B =# produced B+ #import (V->B)

#sold B 不变.
#import (V->B) 增大
# produced B 必然减小

如果是avg time to assemble a television decrease了,就意味着效率提高,# produced B不一定减少,说不定增加了,和上面矛盾

winny0821

题干说V国的电视机装配工人每小时的工资一直比B国低。从B国三年前豁免V国电视机关税以来，B国的电视机年销量没有变化。但是，近期的统计数字显示B国电视机装配工人的数量减少了。因此，更新的贸易统计数据将可能显示每年B国从V国进口的电视机数量增加了。

题干的逻辑思路是这样的，B国最近三年电视机的总销量没有什么变化，但是自己本国生产电视的装配工人却减少了，因此为了满足同量的市场需求，B国一定从V国进口了更多电视机。

但是，B国生产电视的装配工人数量减少，是不一定会导致B国国产电视机的产量减少的。比如，正如C选项中提到的，如果B国生产电视机工人的效率提高了，那么虽然人员数量减少，最终的产量也许甚至会超过原来。所以为了支持题干的论断，我们必须假设，B国工人生产每台电视机需要的时间并没有大幅减少。