错误地滥用时间就是指出错误。抓住他们——注意到他们——这是至关重要的。如果你没有在自己的头脑中区分有用的信息和错误的信息，那么你根本就没有在学习，你只是用错误的信念取代了无知，这并没有任何进步。然而，该男子的陈述中有一部分是真实的，那就是说出来是没有用的。如果我知道老师错了，但什么也不说，那么我仍然是唯一知道的人，这使我比那些相信老师的人有优势。
(The criminal misuse of time was pointing out the mistakes. Catching them―noticing them―that was essential. If you did not in your own mind distinguish between useful and erroneous information, then you were not learning at all, you were merely replacing ignorance with false belief, which was no improvement. The part of the man's statement that was true, however, was about the uselessness of speaking up. If I know that the teacher is wrong, and say nothing, then I remain the only one who knows, and that gives me an advantage over those who believe the teacher.)
