Trying to track this down leads you through a merry-go-round (people should link to actual posts, not merely home pages) so the link isn't really worth following (I found a much better link, here, about five hours later). But the thought is definitely worth echoing. "You can't figure this stuff out from the outside." Quentin D'Souza adds, "Never listen to a presenter or keynote that has not been immersed in the environment that they are talking about. You will be misinformed." That's a bit extreme. But people who are not immersed are much more likely to make mistakes about the environment. This is why it's better to be immersed in a topic rather than to be merely told (or 'taught') about it.