ｆｅｉｆｅｉ－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. 

  
B 我觉得推不出。原文说，虽然并非所有的good cookers是big eater，但他们都喜欢准备食物。怎么能倒着说喜欢准备食物的就是good cooker呢？混淆了充分和必要条件吧？
 
E 我也觉得推不出。原文说了上面的三种厨师都是好厨师，如果原文再说，所有的好好厨师都是big eater，那我觉得才可以推出 are all big eaters
 
请教。谢谢……

IN fact, I think you did a litttle too many questions without deep understanding of GMAT....

Concentrate more on OG.

Good Luck

今天也看到了这个题，还想再顶一下：这个题我和楼主有同样的困惑：

feifei给的解释是：A,B,E均可由原文推出，这么说我认为是又问题的，就像搂主说的一样:B实际上是原文的逆命题，可是我们都知道原命题并不与逆命题等价，我对这道题的解释是：其他的几个答案都有可能从原文推出或者是有可能正确的，而只有D,明显的讲结论取非，所以是肯定不能从原文推出的。

不知道NN们这么看？

我觉得2楼和3楼的态度很不能让人理解，有问题大家来讨论时很正常的，如果不知道答案也就算了，为什么还要说风凉话呢？我也考GMAT,但我还是认为做些LAST题对逻辑水平的提高时有好处的，虽然我也不能解决楼主的问题，但也觉得，只要有交流，就有提高的可能。

支持楼主

我今天做这道题也和楼主,四楼有类似的疑问,

b很明显是逆命题,是推不出的.

c也却实推不出

e与原文最后一句相反,所以也推不出.e说这三种都是big eater,但原文说尽管他们不都是big eater

应lawyer的要求,我贴全题目

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. 

我也觉得2,3楼好过分

我也考GMAT,很多NN心经中都提到费费逻辑宝典我才做的.而且既然挑的是与GMAT最象的135道题,那岂不是为gmater准备的嘛过分

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? D

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. 

feifei的解释：

A.        原文的第一句，从原文推出，不能肯定50%-80%的good cook 不是喜欢用贵的原料

B.         从结论可以推出，AàB but B不一定能够反推出A 

C.         推不出这种比较，无关。

D.        正确。结论：但是即使并非所有的好厨师是big eaters，他们却全都喜欢准备和供应食物。说明喜欢准备和供应食物的好厨师的人数更多，是big eaters的好厨师的人数相比较少。D选项与原文的结论相反。