What's the right course of action for cross-site duplicates?
There are two flavors:
A question is posted which belongs on another site and ends up already having been asked there. I can't find an example right now, but it's bound to happen soon if it hasn't already.
- Move it to the proper site and close it once it gets there as a duplicate.
- Provide a way to close it right away as a cross-site duplicate, without moving it first.
- Flag it and let a moderator merge them.
- Close it as "no longer relevant" or something else.
Additionally, flavor 2 is a bit of a special case; perhaps the question really spans both sites in terms of content and intended audience. Should multiple-postings in this case be allowed? If so, should they somehow be linked to each other? If not, how do we avoid a migration war?