Earlier quoted context omitted.
Honestly, this seems more like a problem with search algorithms than Stack Overflow. If the canonical documentation is more helpful to more people, it should rank higher. If Stack Overflow Documentation is more helpful, _it_ should rank higher. It doesn't hurt to try to create a resource that might end up being more useful to more people. But until it really is, it needs to be ranked as so.
My point is, why would you duplicate documentation both on the canonical source and in Stack Overflow? For example, Flask [1] has a great and complete documentation, but still someone is starting to duplicate it on SO Docs. Why are we wasting time duplicating things instead of improving what's already there? [1] http://flask.pocoo.org
It's only the first day, and there are a lot of people scribbling, but there are also a lot of eyeballs on it (user review of edits is how Docs works). Hopefully over the long run we can keep a lid on this kind of information smearing.