标题: 求助 逻辑题一道 [打印本页] 作者: andyluzhen 时间: 2014-4-17 20:35 标题: 求助 逻辑题一道 A rare disease, malicitis, is being diagnosed with increasing frequency. The number of cases reported this year is more than double the number reported four years ago. The government should now allocate more funds for treatment and prevention of malicitis.
All of the following, if true, would weaken the conclusion except
A. funds already available for research in malicitis are currently under-utilized
B. a new test employed for the first time this year detects malicitis at a considerably earlier stage in the development of the disease
C. the number of cases reported this year represents the same fraction of the population as reported in all of the last five years
D. a committee of experts reviewed the funding four years ago
E. a private foundation has committed sufficient funds to cover treatment and prevention needs as well as research for the next five years
fraction 不是指 (现在生病的人比上总人口比例)等于(过去五年间每年生病人口比上总人口的比例)吗?
题干中说The number of cases reported this year is more than double the number reported four years ago,那么生病人口的sheer number 增加了,政府多花钱也就justified了.
不明白啊作者: 不构成熟 时间: 2014-4-19 16:30
以下言论纯属个人看法,我觉得这道题逻辑链是这样的,该疾病的increasing frequency发生率增加了,所以政府应该allocate more fund ,发生率是一个比率,是fraction,而C选项是说比例没变,所以就是可以看作发生率没变,就不需要allocate more fund了,就削弱了作者: andyluzhen 时间: 2014-4-19 16:57
C选项的问题:C. the number of cases reported this year represents the same fraction of the population as reported in all of the last five years 拿今年一年的案例人数和前五年的和去比较是没有任何意义的,最常见的“相对值”和“绝对值”不具有可比性。
主要看看D:
D. a committee of experts reviewed the funding four years ago
它攻击了本体最明显的fund问题。尽管说得略隐晦(做了好几遍prep我觉得选项这么隐晦的不多),其实还是攻击到了结论。如果一开始就有专家团在review 这个fund了(我总感觉D选线还缺半句啊,应该是专家团当时view过了fund,钱不是他们的主要问题之类的意思)所以我才觉得有点隐晦。但是纵向比较五个选线,这是唯一一个在攻击flaw的,选吧。作者: andyluzhen 时间: 2014-4-21 16:27