"A man doesn’t know what he knows until he knows what he doesn’t know." ― Laurence J. Peter Topic(s): Science More From Laurence J. Peter "If two wrongs don’t make a right, try three." "An economist is an expert who will know tomorrow why the things he predicted yesterday didn’t happen today." "The best intelligence test is what we do with our leisure." More In Science "It was generally believed that Catholics were not interested in arts and science graduate schools. They weren’t going to be intellectuals. And so I put the theses to the test. And they all collapsed."― Andrew Greeley "When I began writing science fiction in the middle ’60s, it seemed very easy to find ideas that took decades to percolate into the cultural consciousness; now the lead time seems more like eighteen months."― Vernor Vinge "Experience by itself is not science."― Edmund Husserl