心理学家必须描述，而非解释。

In computer architecture, the only constant is change.

The writer is a man who has to live in the world but not be of it.

Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.

"Randomized experiments are the gold standard for causal inference, but they are not always feasible."

我没有计划。我从来没有。我只是做当时感觉对的事情。