'Project Oxygen colead Neal Patel recalls, “We knew the team had to be careful. Google has high standards of proof, even for what, at other places, might be considered obvious truths. Simple correlations weren’t going to be enough. So we actually ended up trying to prove the opposite case—that managers don’t matter. Luckily, we failed.”'

This almost made me laugh out loud. So, what he's saying is, 'We knew we could not prove managers matter, so we went ahead and tried to prove managers don't matter, knowing we would fail."

This looks very promising!

Here's a suggestion. My favourite source for Rails docs is apidock.com because it allows people to comment and supply examples. It would be really nice if devdocs could incorporate something like that or perhaps even a wikipedia-like way to update the docs.