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标题: 如何用画圈法解决formal logic问题? [打印本页]

作者: Lucky0506    时间: 2005-7-13 18:20
标题: 如何用画圈法解决formal logic问题?

Laywer在考试如何做逻辑中曾提到: “FORMAL LOGIC(有指示词SOME, ALL, NONE, MOST是SUBJECT之间的包容关系,用画圈圈法解) “


我对这些词之间的包容关系不是很了解,今天遇到一道题,希望大家指教一下。


63. Some good cooks are gourmet cooks who pride themselves on always using extravagantly rich ingredients in elaborate recipes. Some good cooks can be characterized as fast-food cooks. They may use rich ingredients as long as the recipes are easy to follow and take little time. Other good cooks are health food enthusiasts, who are concerned primarily with the nutritional value of food. But even though not all good cooks are big eaters, they all enjoy preparing and serving food.


If the information in the passage is true, which one of the following CANNOT be true?

A.        Most good cooks do not use extravagantly rich ingredients. 
B.        Everyone who enjoys preparing and serving food is a good cook. 
C.        More good cooks who use extravagantly rich ingredients are big eaters than are good cooks who do not use such ingredients. 
D.       There are fewer good cooks who enjoy serving and preparing food than there are good cooks who are big eaters.
E.   Gourmet cooks, fast-food cooks, and cooks who are health food enthusiasts are all big eaters. 

答案是D,我已经知道D为什么推不出来了。


但是其他选项呢?怎么通过画圈法分析以排除其它选项呢?谢谢大家!


[此贴子已经被作者于2005-7-13 18:49:08编辑过]

作者: lawyer_1    时间: 2005-7-13 19:31

1.GMAT纯粹是考概念包容关系的几乎没有,所以MM就别管拉


2。该题问的是那个选项必错(和原文矛盾),不是推不出,如果是推不出,那不是答案。


3。D和原文最后一句话矛盾。其它选项和原文不矛盾:无关,没有必然关系


最后,给MM的建议是:看我的文章时,先别太注重特例,这样会本末颠倒的。


作者: Lucky0506    时间: 2005-7-17 18:14

谢谢Laywer的回复!


“2。该题问的是那个选项必错(和原文矛盾),不是推不出,如果是推不出,那不是答案。”


你的回答永远都那么的一针见血!实在佩服~~






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