大牛救命！！！OG13 CR-58（OG12 60）到底是因果型结论用他因削弱吗？？？

SherlockedJohn

58. Red blood cells in which the malarial-fever parasite resides are eliminated from a person’s body after 120 days. Because the parasite cannot travel to a new generation of red blood cells, any fever that develops in a person more than 120 days after that person has moved to a malaria-free region is not due to the malarial parasite.

Which of the following, if true, most seriously weakens the conclusion above?

(A) The fever caused by the malarial parasite may resemble the fever caused by flu viruses.

(B) The anopheles mosquito, which is the principal insect carrier of the malarial parasite, has been eradicated in many parts of the world.

(C) Many malarial symptoms other than the fever, which can be suppressed with antimalarial medication, can reappear within 120 days after the medication is discontinued.

(D) In some cases, the parasite that causes malarial fever travels to cells of the spleen, which are less frequently eliminated from a person’s body than are red blood cells.

(E) In any region infested with malaria-carrying mosquitoes, there are individuals who appear to be immune to malaria.

Argument Evaluation
Situation The malarial-fever parasite lives in red blood cells, but these cells are eliminated after 120 days. If the infected person moves to a malaria-free region, any new fever that occurs after 120 days cannot be due to the malarial-fever parasite.
Reasoning What weakens the conclusion? The passage says that the malarial parasites that reside in red blood cells are eliminated after 120 days. What if malarial parasites can also reside in other places in a person’s body? If for instance the parasites can reside in the spleen, from which they are not eliminated as frequently, as well as in red blood cells, they may not be eliminated within 120 days. Therefore, they could cause malarial fever after the 120-day period. In that case, the conclusion ruling out a new generation of malarial parasites as the cause of new fever is unfounded.

A The issue is not about a similarity of symptoms but about where the parasites reside.

B The existence of malaria-free regions is not in question.

C The argument gives no reason to postulate any significant connection between the discontinuation of medication and the issue of whether symptoms can persist after a patient has been in a malaria-free region for 120 days.

D Correct. This statement properly identifies a point that weakens the conclusion.

E This tells us only that some individuals are immune; it does not help us determine whether those who are not can have symptoms occur more than 120 days after moving into a malaria-free area.

The correct answer is D.

-----------------------------
【我的分析】
前提：疟疾寄生虫所在的红细胞会在120天后被清除。
结论：【因】寄生虫不能转移到新的红细胞里去【果】当一个人被转移到无疟疾区域后，任何超过120天的高烧不会是由于疟疾寄生虫引起的。

这道题到底是因果型结论吗？？我觉得原文结论应该是很明显的因果型结论形式啊！Because.....
D选项感觉像他因，削弱的是：他因导致超过120天的高烧还是可能由疟疾寄生虫引起。可是！！！！他因削弱的方法不是：“他因导致结论”吗？？？这里怎么是【他因导致原文结论不成立】啊？？？？？？？？
求救！！！！！！！！！！！他因到底是闹哪样啊？？？？？？？曾经做GWD还做到个塑料雪橇导致滑雪受伤人数增加的那道争议题，很多大牛都说那道题是【他因导致前提不成立....】真心跪了....这他因难道是灵活多变？？？？？？？只要提供一个其他的原因就叫他因？然后管他针对前提还是结论都行？我混乱了...............................
还有因果型结论的判断标志到底是根据结论句的形式还是根据句意判断啊................比如：http://forum.chasedream.com/thread-881858-1-1.html 这个我就分不清！！！！

救命！！！！！！！！！！！！！！！！！！！！！！！！！！！我真心觉得搞分类按题型方法做题快死了！！！！！！！！！！每次碰到个和题型做法套路不同的题就纠结的想死！！！！！！！！！！！！！还不如凭自己的逻辑直觉做题还不会那么纠结呢55555555555555555555555

irenetopia

逻辑小白路过
亲，因果型的题目是不用他因排除的
你所说的接近于“他因排除的”我猜应该叫改变因的一个因素
这道题【因】寄生虫不能转移到新的红细胞里去【果】当一个人被转移到无疟疾区域后，任何超过120天的高烧不会是由于疟疾寄生虫引起的。
要找到改变因的一个因素导致结果不成立，你就想啊，那就是超过120天的高烧是因为疟疾产生的，也就是寄生虫还是引起了高烧对不对？
既然在红细胞里的寄生虫是可以排除的，那寄生虫会不会通过其他方式留下来呢？
然后D不就bingo了么！
这个不会是果因，因为寄生虫先要留下来，才能引起高烧对不对？结论是任何超过120天的高烧不会是由于疟疾寄生虫引起的。就是因果型

irenetopia

建议你看看介个http://forum.chasedream.com/foru ... &highlight=HELR

SherlockedJohn

irenetopia 发表于 2013-11-21 20:21
建议你看看介个http://forum.chasedream.com/forum.php?mod=viewthread&tid=868306&highlight=HELR

谢谢！好贴！

SherlockedJohn

irenetopia 发表于 2013-11-21 20:21
建议你看看介个http://forum.chasedream.com/forum.php?mod=viewthread&tid=868306&highlight=HELR

请问NN有研究过helr逻辑方法吗？我过两天就要考试了还有好多JJ米看语法也有很多问题，没时间钻研逻辑了5555555555能否就这题帮我解答下？感激不尽

irenetopia

SherlockedJohn 发表于 2013-11-24 18:26
请问NN有研究过helr逻辑方法吗？我过两天就要考试了还有好多JJ米看语法也有很多问题，没时间钻研逻辑了55 ...

啊啊啊，我不是NN，我是逻辑小白，也在备考呢
helr的方法我觉得特别好，但是还没有摸透，这两天在看题
反正把做过的题目多看几遍，总结，千万不要题海

SherlockedJohn

irenetopia 发表于 2013-11-24 20:20
啊啊啊，我不是NN，我是逻辑小白，也在备考呢
helr的方法我觉得特别好，但是还没有摸透，这两天在看题
反 ...

恩！下次好好钻研..........╮(╯▽╰)╭

醒醒Shine

我之前没想明白B，OG的解释太理所当然了。no-native真心不好懂。

后来想明白了一个思路：
病原体的到处都有——那么 a malaria-free region也可以有——那么 a malaria-free region就可能是cause之一了——这样就很有可能S了原命题！

醒醒Shine

不知道这么想对不对，求指导、求评价！

Hendy

irenetopia 发表于 2013-11-21 20:19
逻辑小白路过
亲，因果型的题目是不用他因排除的
你所说的接近于“他因排除的”我猜应该叫改变因的一个因素 ...

小白我爱你啊，真实太通熟易懂了
PS你的头像的风景好像是俺们老家