求大神指点！！！og verbal review里面的一道题！

10nianyilunhui

a study of marital relationships in which one partner's sleeping and waking cycles differ from those of the other partner reveals that such couples share fewer activities with each other and have more violent argument than do couples in a relationship in which both partners follow the same sleeping and waking patterns.thus, mismatched sleeping and waking cycles can seriously jeopardize a marriage.

which of the following,if true, most seriously weakens the argument above?

（a）married couples in which both spouses follow the same sleeping and waking patterns also occasionally have arguments that can jeopardize the couple's marriage .
(d)  people in unhappy have been found to express hostility by adopting a different sleeping and waking cycle form that of their spouses.

正确答案是d，可是为什么a不对呢？？？求指点，感谢！

killmcgill

Weaken argument的逻辑链是打断同样生活方式C并不比非同样生活方式C对婚姻好。选项A并没有将两者先建立连接然后打断。

melody319108

个人见解哈 ： 原文逻辑链--- 不同生活方式的couple很少share activities----有更多violent argument ---结论 不同生活观对婚姻不利
削弱原文结论 --- 原文结论主语是不同生活观的（couple） A选项重点说生活观相同的couple --无关或影响不大
D选项 --- 原文的逻辑说因为生活观不同导致argument  D选项否定了逻辑关系 说因为有争吵才导致了生活观表现不同

如果正向思维比较难接受还可以考虑下逆向思维的逻辑漏洞
削弱结论--- 取非 不同生活方式没有不利于婚姻 看选项哪个支持或更有信服力 A说 那些相同生活方式的couple也吵架 ---这个就没有回答问题 hope it helps