GMAT逻辑weaken题型与support题型不仅文章结构相似，连解题方法也有很多相通之处，只是问题的提问方向和答案的选择方向相反，相信看完小编的介绍大家会有所了解。
一、GMAT逻辑weaken题分析
1)weaken题的定义。
weaken题，又称削弱题型。正确答案要反驳文中的观点，或者弱化结论成立的可能性。与前面讲的support题型正好相反。
2)weaken题的标志：
1)标志词：weaken、undermine、cast doubt on、weakness、threaten、call into question…
2)典型问法。
Which of the following, if true, would most seriously weaken the conclusion drawn in the passage?
Which of the following, if true, would indicate the most serious weakness in the plan above?
Which of the following, if true, casts the most doubt on the conclusion drawn above?
二、GMAT逻辑weaken题考察形式分类
1、解题思路：
GMAT逻辑weaken题相对来说也是比较简单，总体思路是提出其他可能性或破坏逻辑关系，使文章结论无法成立。具体有以下多种技巧可以排除错误答案。
2、解题技巧：
1)weaken题原文中必须出现结论，因此判断出结论最重要。
2)关注结论，几乎所有正确选项都对结论产生影响。
3)原文信息当中的推理错误要仔细读。
4)weaken题经常需要用到预测选项特征。
5)正确选项中经常出现原文没有的新信息。
6)weaken题目正确选项从来不会攻击premise(即前提都是默认为真的)(除非该前提是一个sub-conclusion)，因此寻找正确答案时，一定要找那个能攻击到推理链的，不要找直接攻击前提的。
3、错误答案特征：
1)Weaken变support。
2)对结论作改写，使得与原文结论有细微差别。
3)无关选项。
三、GMAT逻辑weaken题例题分析
例题：OG16-P503-4
Editorial: The roof of Northtown’s municipal equipment-storage building collapsed under the weight of last week’s heavy snowfall. The building was constructed recently and met local building-safety codes in every particular, except that the nails used for attaching roof supports to the building’s columns were of a smaller size than the codes specify for this purpose. Clearly, this collapse exemplifies how even a single, apparently insignificant departure from safety standards can have severe consequences.
Which of the following, if true, most seriously weakens the editorial’s argument?
(A) The only other buildings to suffer roof collapses from the weight of the snowfall were older buildings constructed according to less exacting standards than those in the codes.
(B) The amount of snow that accumulated on the roof of the equipment storage building was
(C) Because the equipment-storage building was not intended for human occupation, some safety-code provisions that would have applied to an office building did not apply to it.
(D) The municipality of Northtown itself has the responsibility for ensuring that buildings constructed within its boundaries meet the provisions of the building-safety codes.
(E) Because the equipment-storage building was used for storing snow removal equipment, the building was almost completely empty when the roof collapsed.
解析：主编：N建筑的房顶因为上一周大雪坍塌了。这个建筑是近期建造的，符合了当地建筑建造安全标准，除了用的钉子比标准尺寸小。由此可见，这个建筑的坍塌说明了即使是一个很小的，微不足道的不符合安全标准的使用，也会造成严重的后果。
下面哪一个削弱了主编的看法?
A 另外一个由于大雪房顶坍塌的建筑，是根据更低的安全标准建造的，无关选项。
B 屋顶的积雪量比建筑建造安全标准预计的积雪量要多很多，所以可能是这个原因导致屋顶坍塌，削弱了主编的观点，正确。
C 因为the equipment-storage building不是用来让人居住的，所以有一些办公室建造条款不适用于这个建筑，无关选项。
D N市的市民有责任确定房屋建造是不是符合建造安全标准，无关选项。
E 当屋顶坍塌的时候，因为the equipment-storage building是用来储备去雪设备的，所以都出去用了，无关选项。
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