Is there a difference between 教训 and 论点 ？
教训  [Lesson;Moral]：指从错误或挫折中得到的经验, 

lessons learned from past failures and mistakes. It emphasizes the empirical aspect of the origin.
Source: http://baike.baidu.com/view/777967.htm



论点 [argument; proposition] 论述中的确定性意见及论证意见的理由。

It does not have to be empirical. It can be anything straight off the dome.
Source: http://baike.baidu.com/view/562734.htm