费费逻辑 75

wahabirds

75. Advertisers are often criticized for their unscrupulous manipulation of people’s tastes and wants. There is evidence, however, that some advertisers are motivated by moral as well as financial considerations. A particular publication decided to change its image from being a family newspaper to concentrating one sex and violence, thus appealing to a different readership. Some advertisers withdrew their advertisements from the publication, and this must have been because they morally disapproved of publishing salacious material.

Which one of the following, if true, would most strengthen the argument?

A.The advertisers switched their advertisements to other family newspapers.

B.Some advertisers switched from family newspapers to advertise in the changed publication.

C.The advertisers expected their product sales to increase if they stayed with the changed publication, but to decrease if they withdrew.

D.People who generally read family newspapers are not likely to buy newspapers that concentrate on sex and violence.

E.It was expected that the changed publication would appeal principally to those in a different income group.

答案是C。。。但是我觉得C好像是削弱的吧。。。

bettytons

题干：P广告商有道德感→Q退出杂志 问加强

C选项：
前提A：尽管有利益——Q退出杂志→ P广告商有道德感。正是有个前提A才能从选项C这个必要条

件假言判断（Q→P），成功的推出充分条件假言判断（P→Q）。即加强题干。
而在没有前提A的情况下，如果知道Q→P，是不能推出P→Q的

wahabirds

哦~~~这个加强的话是不是类似假设啊？？~~

bettytons

简化题干：因为广告商有道德感，某杂志文章内容改变导致广告商退出此杂志。问加强
A广告商将广告转向其他家庭生活出版物。削弱，因为这说明广告商还是主要为了利益
B有些广告商从家庭生活出版物转向性和暴力出版物。削弱，因为这也说明广告商是为了利益，

而转向不利社会的出版物。
D讲的是读者，和出版商没有什么关系。从大的角度来看，也说明广告商为了利益，因为广告商

需要抓住这种not likely to buy newspapers that concentrate on sex and viollence的读者，

所以他们退出了已经改变内容的杂志。
E这种杂志将吸引另一读者群。广告商推出了，因为他们的目标群已经不再读这本杂志了。削弱
C尽管广告商知道他们继续在更改了内容的杂志上打广告将获利更多，而退出将减少获利。但是

他们还是退出了，多么有道德感啊~~加强。
多多指教