We currently have three Meta tags that relate to topicality:
A question about on-topicness or off-topicness (separately) are still about scope. A general question about topicality could still use all three and even site-policy. I've seen them used inconsistently sometimes, although that isn't quite so bad since the tags still fit properly.
Should we have one universal tag called, say, topicality? If this is done, then the three listed tags could be synonymized or merged into the new one.
I have already proposed synonyms
However, I doubt that anyone has score enough points for scope to vote for approval. If this answer gets sufficient upvotes, I'll manually approve it instead.
I considered a [topicality] tag, but it wasn't in use on Stack Overflow meta, so I didn't want to start doing something different.
I think this is the simplest solution that could solve the tag overlap problem.
off-topic has 24 questions, scope has 10 questions, and on-topic has 29 questions and no tag wiki.
I don't see why we would need more than just one tag for this. They're all about the same thing really, and 9 questions are even tagged with both on-topic and off-topic!
site-policy has 69 questions, 13 with on-topic, 10 with off-topic, 5 with both, and 2 with scope.
Now, topicality might be an appropriate term, but I haven't seen it used on any meta site.
MSE has 303 questions under scope, 430 under off-topic, and... a grand total of 0 for on-topic.
Here's the MSE tag wiki for scope (emphasis mine):
scope is used to define what is pertinent to discussion. Generally, the scope determines what the site is about. Issues arising from scope might have to do with whether a certain question is on-topic or not, but also can be used to evaluate whether an entire topic should be up for discussion (especially as it pertains to specific Stack Exchange sites).
Using this tag indicates that the question is requesting help with scope (normally as a specific use of a general topic), and answers should generally relate to the scope of the site and whether the topic raised generally relates. It also may be the case where a user has a question, but doesn't know where it belongs.
Looks like it's our definition of "scope" that's too narrow.
Hence, I suggest we burn on-topic, redefine scope and retag [up to] 30 meta-questions (10+29-9) with off-topic, which becomes the new king of topicality questions, as it seems to be on the majority of SE sites.
English Language & Usage calls their tag [on-topic-off-topic]. I think that name is clear and covers everything related to topicality and scope.
