标题: OG 12 33充分必要性~~ [打印本页]
作者: xiaoxuanchu 时间: 2013-6-2 07:36 标题: OG 12 33充分必要性~~
Advertisement：today's customers expect high quality. every advance in the quality of manufactured products raises customers' expectations. the company that is satisfied with the current of its products will soon find that customers are not. At Megacorp, meeting and exeeding customers' expection is our goal.
which of the following must be true on the basis of the statements in the advertisement above.
A. Megacorp's competitors will suceed in attrcating costomers if those competitors adopt Megacorp's goal as their own.
B A company that does not correctly anticipate the expectations of its customers is certain to fail in advancing the quality of its product.
C Megacorp's goal is possible to meet only if continuing advances in product quality are possible.
D If a company becomes satisfied with the quality of its products, then the quality of its product is sure to decline.
E. Megacorp's customers are currently satisfied with the quality of its product.
选C，看了一下之前的帖子，也有人问过这题的充分必要性的问题，但没解决==
C中说only if 我觉得不妥，文章中并没有说 只有这一个办法才能使 M公司meet its goal啊
文中的逻辑链是 increase quality推meet expectation，meet expectation is M's goal
C中的逻辑链是 meet M's goal推 increase product quality和原命题正好是逆命题啊，不等价！！OH...自从听了费允杰的音频关于各种逆否命题。。。对于归纳就越发模糊了。。。。。。。。。
作者: mingmings 时间: 2013-6-3 06:35
C 的意思是要meet Megacorp公司的goal，即meet and exceed customers'
expectations的必要条件（必须）产品质量会持续进步。原文customers expect
high quaility, 所以只要质量持续进步了 才有可能满足或超过消费者期望。你
可能把必要和充分条件搞混了，要事一个结果成立可能有很多因素，如A1，A2，
A3，……推出B。但B要成立，A1一定要满足。
作者: nancy5130 时间: 2013-6-3 18:56
我觉得这是个逻辑循环的题：
Premise 1: customer expects high quality; high quality raises customer's expectation.
Premise 2: company's goal is to meet or exceed customer expectation.
Question: Draw a conclusion
因为premise 1是一个逻辑循环，premise 2是逻辑循环的一部分(customer expectation), 所以结论应该是跟逻辑循环的另一部分(high quality)有关，就是我们绕着这个逻辑圈走。
C选项做出的结论中用了only if: A only if B, B是A的必要但不充分条件。XDF有个例子是：
The picnic will be canceled only if it rains. (A=The picnic cancels, B=it rains)
B是A的必要但不充分条件，我们可以知道取消野餐的唯一条件就是下雨了。即通过取消野餐我们就必然能推断出天下雨了。但是反之不然，天下雨了，还可以推断出别的很多情况，比如下雨了，路就会很泥泞等等。
再看C选项中，
A=Megacorp's goal is possible to meet，B=continuing advances in product quality are possible。B是A的必要但不充分条件。即Megacorp达到目标(meet or exceed customer's expectation) 的唯一条件是product quality进步了。这就符合了我们原文的逻辑循环(因为customer expect high quality)。但是反之不然，advances in product quality导致的结果就有很多了，比如product的耐用性更好或者环保性更好等等，B就不是A的充分条件了。
不知道我有没有说清楚啊~
作者: xiaoxuanchu 时间: 2013-6-4 05:47
Meet customer expectation一定能推出 提高品质，我觉得不一定诶， 可以是其他方式meet啊
作者: nancy5130 时间: 2013-6-13 15:39
因为passage中谈论的customer的expectation是high quality, 所以要meet customer的这个expectation，那么就需要提高product quality.
假如customer的expectation是enviromental product, 那么要meet customer的这个expectation就需要develop environmental product.
所以总的来说，还是要看passage中告诉的信息吧~
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