What are the standards of evidence for an answer here? I know this isn't Skeptics, but I've seen several answers justified using intuitive "logic", without any citations. Should that be considered acceptable? What standards of evidence should we require for answers here?
I think we're better served by simply down-voting a question if you believe it to be wrong, otherwise this site is little more than a mechanical Turk for research.
You really only need an authoritative search in you answer if the question calls for one(maybe they're in a political discussion elsewhere, and need to bring sources with them)
But if someone's simply asking for a broader understanding on an issue, than a source isn't quite necessary. It is very possible to describe an issue without proving it.
You can always down-vote an answer if it is wrong.