The complexity of a learning problem is often determined by the size and structure of the hypothesis space.

"One must be an inventor to read well. There is then creative reading as well as creative writing."

The future is always changing, but the past is always the same.

译文：陛下你实在应该广泛地听取别人的意见，来发扬光大先帝遗留的美德，振奋有远大志向的人的志气，不应过分看轻自己，援引不恰当的譬喻，以至于堵塞忠言进谏的道路。

生存还是毁灭。这其实不是一个问题。