Three-fourths of the mistakes a man makes are made because he does not really know what he thinks he knows.

Three-fourths of the mistakes a man makes are made because he does not really know what he thinks he knows.

一个人犯的错误有四分之三是因为他并不真正知道他自以为知道的东西。

-- James Bryce, 1st Viscount Bryce 詹姆斯·布莱斯，第一子爵