OG-48

dabendan12

48. A researcher discovered that people who have low levels of immune-system activity tend to score much lower on tests of mental health than do poeple with normal or high immune-system activity. The researcher concluded form thsi experiment that the immune system protects against mental illness as well as against physical disease.
The researcher's conclusion depends on which of the following assumptions?
(A)High immune-system activity protects against mental illness better than normal immune-system activity does.
(B)Mental illness is similar to physical disease in its effects on body system.
(C)People with high immune-system activity cannot develop mental illness.
(D)Mental illness does not cause poeple's immune-system activity to decrease.
(E)Psychological treatment of mental illness is not as effective as is medical treatment.

The answer is D.

But I couldn't understand at all. Anyone can help? Thanks in advance!
前提:低的I-S activity-----脑子有问题(精神病)
结果:I-S 抵抗了精神病和生理疾病

思路:假设是支持前提, 因为生理疾病在前提里没有出现过,所以只要支出生理疾病与精神病有关,搭个桥,问题就解决了.我的答案是B.不幸的是答案是D.我实在想不通精神病不会造成IS activity 低下怎么可能是一个假设?能不能帮我解释以下?拜托啦!

番茄炒蛋

原因很简单
因为)Mental illness  和 immune-system activity to decrease同时出现，你要想说明是A->B,就一定先假设B*->A（b不能推出A）

dabendan12

实在没有想到还有人趴在网上. 谢谢! 番茄炒蛋gg,能不能说得详细点?为什么要说明A-B,就一定先假设B*->A.在钱永强的逻辑里可没有说到这个.他只说到桥梁型,排它型和无因就无果型.

jandj_shanghai

levels of immune system (A)和 mental illness (B)同时出现，有某种相关性。如果researcher认为A（因）导致了B（果），换句话说，他assume不是B（果）导致了A（因）。

dabendan12

OH, great. Got you. THanks a lot!

2045977

我觉得这题还是有漏洞的，因为reserchers 最终concluded 的是the immune-system protects against mental illness as well as against  physical disease. 而不是单纯的the immune-system -->mental health的结论呀。而d里没有给出从mental health 推physical disease的假设，只是immune-system activity 与mental illness的关系。你们大家说是吗？谁能给出更好的解释呢？谢谢！

ericguo

对呀，当初我就是被这个physical disease给误导的，因为只有B能够解释physical disease与mental disease一样与immune system有关联。谁可以解释一下吗？

lost_my_account

这个题目超级典型啊。

hl00

偶想：本题是由实验推到结论，应寻找因和果之间的差异。而实验并未涉及physical disease，因而它对逻辑而言，属无关词。不应为选项。

不知对不对？

wonderful0928

levels of immune system (A)和 mental illness (B)同时出现，有某种相关性。如果researcher认为A（因）导致了B（果），换句话说，他assume不是B（果）导致了A（因）。

精辟！茅塞顿开，多谢了j