[求助] 削弱题削弱的到底是什么？

fay_1017

盼高手指点一二，谢谢啦！！！

记得当初费费说过，weaken题是要削弱结论，还举了个例子：
I wish I have a wing to fly.
削弱的话，用 My bone is not hollow 去削弱结论，而不能用 I don't have any wing. 去削弱前提。

可是我做题时发现大部分weaken题都是针对前提进行削弱的。
费费是不是讲错了？～～～
   [em12][em12]

wxd5118

In general, weaken question has four types, namely other reasons explaining phenamena and directly weakening premise,  conclusion, and the argument(the course of reasoning)