Is the on-topic help page supposed to be exhaustive? By exhaustive, I mean it contains all admissible topics, and any topic not listed there is off-topic.
1 Answer
No, that would be an ever-changing target. The on-topic help page is supposed to describe the general scope, but there will always be edge cases. And especially during the beta stage, a site's scope can be in some amount of flux.
All that said, this site's on-topic page would benefit from an "and not about..." section -- if your question is about A, B, C, or D, and not about E, F, or G, then you can ask it here. That way the page provides both positive and negative "signposts". Some examples of this style: