Stan, I think that CZ means that scientists are a highly competitive and critical bunch, delighted to pick holes in each other's arguments and data. Hence the self-correcting nature of science - if you are wrong, your colleagues will be delighted to point out your mistakes. Much better to find them yourself before publishing; it saves a lot of embarrassment. In a huge field like neuroscience, there are thousands of very smart people in Europe, Asia, and North America scrutinizing each other's work.
