请教OG-130

wujie_rens

130. Bank depositors in US are all financially protected against bank failure because the government insures all individuals 's bank deposits . An economist argues that this insurance is partly responsible for the high rate of bank failure , since it removes from depositors any financial incentive to find out whether the bank that holds theri money is secure against failure . If depositros wre more selevive , then banks would need to be secure in order to compete for depositors's money.
assumtion.
D. The difference in the interests rates paid to depositors by different banks is not a significant factor in bank failures.
E. Potentail depositors are able to determine which banks are secure agaisnt failure.
Ans;E,我明白E是假设.
那么D呢?
有一题类似的:
OG.80
The program to control the entry of illegal drugs into the country was a failure in 1987. If the program had been successful , the wholesale price of most illegal drugs would not have dropped substantially in 1987.
assumption:
E.A drop in demand fro most illegal drugs in 1987 was not the sole cause of the drop in their wholesale price.
Ans:E
上一题的D与下一题的E有什么区别吗?为什么一个是假设,而另一个却不是呢?
谢谢.

falcons

说的真好，我是逻辑菜鸟，觉得这道题很绕。因为存款人不管银行的安全性，所以银行就不在乎自身的安全性，导致容易破产。而“存款人不管银行的安全性”是因为政府有insurance。E选项排除了“存款人不管银行的安全性”的一个原因：没有能力去选。所以只能是“政府有insurance”这个原因了。不知道这种思路对不对，请大虾们指点！

woodruff1

对于assumption最有效的判断是取非：若将选项取非，结论不成立。则它必是assumption.

通常assumtion的三种答案模式：1。A, B 之间的联系 2。 别的原因不导致B. 3. A成立或有意义。

OG130. “this insurance is partly responsible for the high rate of bank failure“ + "If depositros wre more selevive , then banks would need to be secure in order to compete for depositors's money.“

选项D: The difference in the interests rates is not a significant factor in bank failures

D看起来很像模式2，但是它并不是。取非后，模式2有排他性。"别的原因导致B"必然与"题中的原因导致了B"矛盾. 但是,"difference is a significant factor" 与 “government insurance partially cause bank failure" 并不矛盾。所以D不对，是一个混淆选项。多么狡猾的ETS阿！

OG80."The program to control the entry of illegal drugs into the country" -> "wholesale price of most illegal drugs would not have dropped"

E."A drop in demand for most illegal drugs was not the sole cause of the drop in price"

取非后，“A drop in demand is the only cause of the price drop" 与 "the program cause the price drop" 矛盾。因此， E是答案模式2。这里，“not the sole cause" 起到了强烈的限定作用。

saibei008

看看第一个题目的D:. The difference in the interests rates paid to depositors by different banks is not a significant factor in bank failures.
注意它的用词， not a significant ,如果这个选项改成： D. The difference in the interests rates paid to depositors by different banks is not a sole fcator of bank failures.
那么D答案就是一个假设了，因为sole的存在排除了所有的他因，而significant不是所有的。第一个题目的D答案应该是个support.