2道互相矛盾的逻辑题，求大牛啊

medusa0901

12. Leachate is a solutions, frequently highly contaminated, that develops when water permeates a landfill site, If and only if the landfill's capacity to hold liquids is exceeded does the leachates escape into the environment, generally in unpredictable quantities, A method must be found for disposing of leachate. Most landfill leachate is send directly to sewage treatment plants, but not all sewage plants are capable of handling the highly contaminated water.
Which one of the following can be inferred from the passage?
(A) The ability to predict the volume of escaping landfill leachate would help solve the disposal problem.
-- New Inforamtion. Hence A can be eliminated.

(B) If any water permeates a landfill, leachate will escape into the environment.
-- Thats against the premise. Hence B cannot be the correct answer choice.

(C) No sewage treatment plants are capable of handling leachate.
Exaggerated answer choice. Hence C can be eliminated.

(D) Some landfill leachate is send to sewage treatment plants that are incapable of handling it.
This answer choice is like a shell game. Though it is possible, some leachate might be send to sewage treatment plants (incapable of handling), however it is not necessary that it has to be true. Hence we cannot infer this from the argument.

(E) If leachate does not escape from a landfill into the environment, then the landfill’s capacity to hold liquids has not been exceeded.
-- From the premise, we can clearly infer that it is true. Hence E has to be correct answer choice.

如果上面这题D错误，那么下面这题为啥D正确呢？

5. Most parents who are generous are good parents, but some self-centered parents are also good parents. Yet all good parents share one characteristic; they are good listeners.

If all of the statements in the passage are true, which one of the following must also be true?

(A) All parents who are good listeners are good parents.

(B) Some parents who are good listeners are not good parent.

(C) Most parents who are good listeners are generous.

(D) Some parents who are good listeners are self-centered

(E) Fewer self-centered parents than generous parents are good listeners.

ychen34

这两道题完全不矛盾啊
先说后一道题， 既然题目中提到了说some self-centered parents are also good parents这句话间接地表明这种既是self-centered parents 又是good parents确实存在
这里的谓语动词是are 不是maybe所以很肯定是有的 至于什么样一个程度我们不知道 所以用some
而第一题只是说有的污水处理厂没能力处理 但是并没有说有些污水送到了那些处理厂；能不能处理污水和是否有不能被处理的污水被送过去是没有必然联系的
假设人们对leachate进行了分类 把那些不易被处理的专门送到了有能力处理的工厂d就错了
但是如果题目多一个条件说 那些leachate并没有分门别类被送到了每个污水处理厂 那么d就可以选了