可信因果推断的关键不仅是方法，还有方法与当前问题的契合度。

"The day I stop improving is the day I should stop racing."

The only thing that can bring you happiness is yourself.

The truth is like the sun. You can shut it out for a time, but it ain't goin' away.

我告诉过你们我会成为第一，我做到了。