elsat set1 page3 no.7/LSAT-1-1-7

gztanwei

7. If Sarah were a concert pianist for a major orchestra, she would be famous. She is not a concert pianist since she is not famous.

The conclusion above is unsound because the author does not consider that

(A) Sarah could be a famous actress.

(B) Sarah could be a harpist for a major orchestra.

(C) Sarah could be a pianist with a rock group.

(D) Sarah could be a concert pianist with a minor orchestra.

(E) Sarah could be famous for another reason.

问题1：答案是D。为什么对minor orchestra取正就可以对原题削弱呢？我选了E，觉得E是用他因削弱。

问题2：我是初哥，听完狒狒说做lsat逻辑可以加强训练对逻辑的感觉，我才找elsat练的，但刚开始做第一套，觉得题目的问法和思路都有明显的不同，所以我想问，elsat应该怎么利用才算是合理的用法呢？

cranberry

具体的练法，需要自己去找适合自己脾胃的，不好乱讲，贻害大家，但此题，你需要从文章的逻辑看。你的理解是把最后一句的since后面的内容当作结论了，或者你没有把第一句当作一个逻辑判断。它相当于一个if，then的判断。后一句实际上是一个类似逆否命题的判断，但它漏掉了题目中的一个信息，真正的逆否命题应该是，她没有名气，所以她一定不是大乐团的钢琴家。

gztanwei

我好像理解了，第二句话应该是

not famous=>not a concert painist

但是错的是concert包含major 和minor，所以题目犯了包含错误，对吗？