Here is a reading of his description of his first sight of the bats and the big cave: "I thought it was a volcano, but then,I'd never seen a volcano nor never before had I seen bats swarm, for that matter.

VOA: special.2009.12.07

I've read through the same thing twenty times and I've missed something obvious. Someone who's never seen it before looks at and says, did you really mean to do this?

但是它们有一双旁观者之眼,我把同一段代码读上20遍,都会漏掉一些很明显的错误，从没看过这段代码的人会告诉我？

麻省理工公开课 - 计算机科学及编程导论课程节选