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题库 / Prep2007E2-CR-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
some celebrities come to the Hollywood to be seen, and so might choose to sit at the tall tables if they were available
the price of meals ordered by celebrities dining at the Hollywood compensates for the longer time, if any, they spend lingering over their meals
a customer of the Hollywood who would choose to sit at a tall table would be an exception to the generalization about lingering
a restaurant's customers who spend less time at their meals typically order less expensive meals than those who remain at their meals longer
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
我觉得题目的意思并不是让我们从题目中找premise攻击吧，on the grounds that是固定搭配“由于”的意思，你可以替换成since ， The argument is vulnerable to criticism “since” it gives reason to believe that it is likely that，何况原文的premise根本没有被削弱，请注意看原文的用词typically，只是说通常情况下，原文没有绝对的说这件事的成立，“diners seated on stools typically do not stay as long as diners seated at standard-height tables.”，
而c选项指出的是这个hollywood的饭店不属于通常情况，攻击的仍然是推理链，大部分都是这种情况不等于你就是。而不选D的原因，a restaurant's customers who spend less time at their meals typically order less expensive meals than those who remain at their meals longer （花更少的钱和花更少的时间是你需要衡量的两个因素，都会对利润造成影响，你根本没法衡量是薄利多销的策略好呢，还是花更长的时间接待更少高消费的顾客带来的利润好，所以无法直接造成削弱。）
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