"Causal inference requires careful thought about the assumptions underlying your analysis."

世界不是由那些正确的人运行的。它是由那些能说服别人他们正确的人运行的。

The world needs energy, but it needs responsible energy more than ever.

朗费罗幽默的秘密源泉并不是欢乐而是悲伤。天堂里没有幽默。

If you’re horrible to me, I’m going to write a song about it, and it won’t be a good one for you.