LSAT-8-2-23

雪落无声

23. Teachers are effective only when they help their students become independent learners. Yet not until teachers have the power to make decisions in their own classrooms can they enable their students to make their own decisions. Students' capability to make their own decisions is essential to their becoming independent learners. Therefore, if teachers are to be effective, they must have the power to make decisions in their own classrooms.

According to the argument, each of the following could be true of teachers who have enabled their students to make their own decisions EXCEPT:

(A) Their students have not become independent learners.

(B) They are not effective teachers.

(C) They are effective teachers.

(D) They have the power to make decisions in their own classrooms.

(E) They do not have the power to make decisions

E,看晕了,一点头绪都没有

1.这样的逻辑关系对吗?

arguement:1.teacher are effective-->when they help their students become independent  learners.--> teachers have the power to make decisions in their own classrooms

students become independent learners--> Students' capability to make their own decisions

conclusion:teacher are effective--> have the power to make decisions in their own classrooms

2.问什么?According to the argument, each of the following could be true of teachers who have enabled their students to make their own decisions EXCEPT

freedownload

1.这样的逻辑关系对吗?

arguement:1.teacher are effective-->when they help their students become independent  learners.--> teachers have the power to make decisions in their own classrooms

students become independent learners--> Students' capability to make their own decisions

我觉得你说的逻辑关系是对的，问题就是问上面红色部分成立，下面哪个不可能成立。

A,B ,C,D都是有可能成立的，虽然不一定成立，但E是肯定不能成立的，你看：when they help their students become independent  learners.--> teachers have the power to make decisions in their own classrooms，E正好说反了。

雪落无声

那再笨奔地问freedownload

怎么说ABCD有可能成立?能用充分必要条件,逆否命题的分析思路给我讲讲吗?

gg的解释看懂了,就是原来逻辑关系的必要条件,加了not 当然不成立.

感谢ing

tianwan

23. Teachers are effective only when they help their students become independent learners. Yet not until teachers have the power to make decisions in their own classrooms can they enable their students to make their own decisions. Students' capability to make their own decisions is essential to their becoming independent learners. Therefore, if teachers are to be effective, they must have the power to make decisions in their own classrooms.

According to the argument, each of the following could be true of teachers who have enabled their students to make their own decisions EXCEPT:

(A) Their students have not become independent learners.

(B) They are not effective teachers.

(C) They are effective teachers.

(D) They have the power to make decisions in their own classrooms.

(E) They do not have the power to make decisions

先把几个概念抽象出来（不要和选项的ABC混淆）

A. Teachers are effective   B. they help their students become independent learners

C. teachers have the power to make decisions in their own classrooms  

D. they enable their students to make their own decisions   

E . Students' capability to make their own decisions   F.Students' becoming independent learners

A->B,B是A的必要条件，D->C，C是D的必要条件，F-〉E，E是F的必要条件。而且隐含D-〉E，  D是E的充分条件，B-〉F， B是F的充分条件。

结论 A-〉C，C是A的必要条件。 所以这个结论是有问题的，因为D和E的关系有问题，A->B->F->E , D->C, 而D和E没有提到E-〉D的关系。如果考weaken，只要说E-〉D是错的，要support/strengthen,只要说E->D是对的.但是这一题没有考这个结论.

题目的逻辑关系复杂，而且推导错误有疑问，但是问题极其简单，只考了C,D之间的关系。这是考阅读的题目。

According to the argument, each of the following could be true of teachers who have enabled their students to make their own decisions EXCEPT:

问：D成立，哪一个不可能发生：选项E ：C不成立。因为D-〉C，所以选项E的内容不可能发生.所以E正确。

请NN指正。