This question seems about to be closed (4 votes currently), because it is (supposedly) "not about math as defined in the help center."
Can anyone explain this to me (if there is an explanation)? I find it mind-boggling. I would say the quality of the question places it very clearly in the top 1% of the site, as a conservative estimate.
PS: I happen to have answered this question, but that's not the reason I'm posting here. Rather, it's the other way around, if I hadn't answered it, I probably wouldn't be aware of the impending closure.
Added later: Thanks to all who attempted to clarify. I do not wish to get involved in any further discussion of this topic at this point, for several reasons, and maybe just one of them can serve as an illustration:
I asked my only question ever on MSE almost exactly 5 years ago, and it led a peaceful existence until yesterday, when all of a sudden it collects 3 close votes and 1 downvote.
Now of course this is so ridiculously childish that one shouldn't take it seriously, and one could even get some entertainment value out of it, but if this is how things are handled on MSE, then it's clearly not the kind of enterprise or activity I want to be a part of.
Added later still: Derek's theory in the comments below deserves praise for its good intentions, but it doesn't match the facts. The close "reason" given in the 3 original close votes was that the question was "too broad." Then apparently someone (rschwieb ?) felt compelled to investigate if more convincing close reasons could be found, and (what a stroke of luck, that!) it turns out that the same question was also asked by someone else. Sure enough, my question is closed now as a "duplicate." Never mind that the other question came later.
All of which is perfectly fine with me; I was feeling slightly embarrassed about the question anyway and would have deleted it if that had been possible. I do advise against further attempts to explain any of this, though.