一道prep上的关于hollywood restaurant的题，没看到对于D的讨论

zjhzkingsam

17.   
At present the Hollywood Restaurant has only standard-height tables.  However, many customers come to watch the celebrities who frequent the Hollywood, and they would prefer tall tables with stools because such seating would afford a better view of the celebrities.  Moreover, diners seated on stools typically do not stay as long as diners seated at standard-height tables.  Therefore, if the Hollywood replaced some of its seating with high tables and stools, its profits would increase.

The argument is vulnerable to criticism on the grounds that it gives reason to believe that it is likely that

(A) some celebrities come to the Hollywood to be seen, and so might choose to sit at the tall tables if they were available
(B) the price of meals ordered by celebrities dining at the Hollywood compensates for the longer time, if any, they spend lingering over their meals
(C) a customer of the Hollywood who would choose to sit at a tall table would be an exception to the generalization about lingering
(D) a restaurant's customers who spend less time at their meals typically order less expensive meals than those who remain at their meals longer
(E) with enough tall tables to accommodate all the Hollywood's customers interested in such seating, there would be no view except of other tall tables

这道削弱题答案是C，我明白它的意思，是直接说其中的一个前提不成立，但是我想问下D为什么不对呢？如果是D的话，因为每顿饭花费的钱少了（虽然换台快了，吃的人多了），所以profit有可能增加，有可能减少，有可能不变，但是削弱题只要使答案有不成立的可能就可以了呀，所以如果每顿饭花钱少了的话，profit是不一定增加的，这样不算削弱了答案了吗？还是说选项C和D都是对的，但是C更直接，所以选C，不选D呢？
望NN指点迷津，谢谢

gmat740740

价格跟利润没有必然关系...没

有人说卖得便宜的菜利润就一定低...说不定便宜的菜因为成本低，而利润跟卖的贵的菜没却别，甚至利润更高都可能

pennmou

The reason to eliminate D) is that this question is a must be true type of question, meaning you cannot introduce NEW information. D) introduces NEW information while C) only points out the self-controversy stated in the stimulus.

If you think about it, how can you deduce D) by reading the stimulus ONLY? The prompt directs you to find something which "gives reason to believe that it is likely" according to the passage.

The following is the complete analysis.

First of all, this is similar to a paradox question and the question stem asks you to find the criticism which points out the deficiency in the argument.  So let's analyze the argument.

Premises:
1) Customers come to Hollywood Restaurant to watch the celebrities so customrs would prefer tall tables to get a better view.
2) Diners seated on stools typically stay a shorter time than diners on regular seats.

Conclusion:
If the Hollywood replaced some of its seating with high tables and stools, its profits would increase.

Basically, the argument says that stools would attract more customers and customers sitting on stools turn over quickly.  Therefore, profits would be up.  Wait a minute.  Based on premise 1, if the customers are attracted to the restaraunt because they want to see celebrities, shouldn't they stay LONGER than normal customers? If so, it runs contrary to premise 2 which describes a general trend in customer's lingering behavior. The customer attracted might sit on the stools for a LONNNNNNNNNNNNNNG time without spending much on food. No turnover, no money!

samuelxie

points out this paradox and C is the correct answer.

zjhzkingsam

楼上高手！！豁然开朗~~哈哈~虽然不太同意是must be true type of Q


关键在题目的问法
The argument is vulnerable to criticism on the grounds that it gives reason to believe that it is likely that

需要细细品位~~

pennmou

True. More like a Most Strongly Supported type, which is one

grade lower of must-be-true type in term of not allowing outside

information and repeating what is said in stimulus.