Haha, I don't want to go too much off topic of this thread, but essentially we can analyze actual file contents, source and metadata to find patterns between file structures and associate them to user and "common" labels.

On top of that we try to get further accuracy by using user information to help us find the context. We call it a Personal System, a repo of knowledge and learned preferences heavily tailored around each individual user. We're just in beta now but definitely put your email down if you want to try it out eventually!