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　　GMAT阅读推理Inference题，顾名思义，推断。

　　Sometimes, the answer to an inference question is obvious or simple. If you cannot think of a reason why an inference answer choice is incorrect, then it is most likely correct.我的方法的核心就是这句话。

　　GMAT阅读推理Inference认识：

　　inference题，推断的信息源于文章信息。题目答案往往是文章没有直说的内容，需要一点点的努力，把答案推出来。与logic structure区别的一点是：答案不需要利用选项提供的新信息。

　　方法使用：

　　逐一排除错误选项(这个方法比较笨，但在复习时还是理解每个选错的错误原因比较好)。

　　错误的选项为3个类别：

　　1.无关选项：文中就没提到任何相关的信息

　　2.有关选项，信息使用有误：文中有相关信息，但原文信息与选项不一致

　　3.有关选项，推断有误：

　　3.1推得太远，原因是需要引入文章外(我们自己想出)的理由。

　　3.2推得太近，原因是选项只是叙述文中的原有内容(也就是没有推断，变成了找细节)。【此类错误很少，往往以其他理由排除ABCD选项后，E虽然推断太近，但仍然是答案】

　　3.3推错了，原因是有相关信息，但推倒过程中出错，是干扰项的主要部分，因为乍一看很正确，仔细一看原文推断不出选项。

　　后记：

　　1.使用该方法并不一定能所有题都正确，因为选项虽然推断正确，但一些词汇，如all、every等，也有可能让选项错误。在这里就先不列到错误类型里，因为所有题大家都应该注意这些细节问题。

　　2.正如大家所看到的3.2，这个方法还有bug，因为楼主本人就遇到一道题，排除了其他选项后，剩下的一个选项就是替换了原文的几个词(很多细节题就是替换原文一些词汇)，当然也可以理解是一种推断。按道理说，原文的细节不应该是推断题的答案，现在我也没法解释这个问题。这个bug有待修复...

　　献上例题一道OG12-33

　　原文：

　　In 1988 services moved ahead of manufacturing as the main product of the United States economy. But what is meant by “services”? Some economists define a service as something that is produced and consumed simultaneously, for example, a haircut. The broader, classical definition is that a service is an intangible something that cannot be touched or stored. Yet electric utilities can store energy, and computer programmers save information electronically. Thus, the classical definition is hard to sustain.

　　The United States government’s definition is more practical: services are the residual category that includes everything that is not agriculture or industry. Under this definition, services includes activities as diverse as engineering and driving a bus. However, besides lacking a strong conceptual framework, this definition fails to recognize the distinction between service industries and service occupations. It categorizes workers based on their company’s final product rather than on the actual work the employees perform. Thus, the many service workers employed by manufacturers— bookkeepers or janitors, for example—would fall under the industrial rather than the services category. Such ambiguities reveal the arbitrariness of this definition and suggest that, although practical for government purposes, it does not accurately reflect the composition of the current United States economy.

　　选项：

　　The passage suggests which of the following about service workers in the United States?

　　(A) The number of service workers may be underestimated by the definition of services used by the government.(正确 文中：the many service workers...很多service工人被算到了industrial category里。所以，数量会被低估)

　　(B) There were fewer service workers than agricultural workers before 1988.(推远了：文中第一句有1988年服务成为第一大行业，但没有支持信息，推不出service workers和agricultural workers之间谁多谁少)

　　(C) The number of service workers was almost equal to the number of workers employed in manufacturing until 1988.(推远了 同上)

　　(D) Most service workers are employed in service occupations rather than in service industries.(推错了/干扰项：貌似正确，并不是more service workers in service occupations than service industries，工人该是什么工作就是什么工作，不是因为定义方法的不同，就使service workers变多了)

　　(E) Most service workers are employed in occupations where they provide services that do not fall under the classical definition of services(该选项推的没错：classical definition:service workers属于service行业，US definition:service workers属于industrial行业。但是!!most service workers 显然不正确，文中只是说many service workers怎么样，而不是most——ETS你太狡诈了!!楼主一开始A选项没看出underestimated是什么意思，就放过了，算成E了...)

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