@amWhy @RRL @JyrkiLahtonen @TheSimpliFire @user21820 @ParamanandSingh Because y'all are involved in the deletion of the question https://math.stackexchange.com/q/3241967/468350, and because I don't want to invalidate a bunch of delete votes before having a brief discussion, my though is that @ArnaudD. 's proposed duplicate is a reasonable target (I don't like "I know the answer but I'm not telling you" aspect of it...
...but it adheres to an older standard, and has a couple of nice answers). I can't *quite* merge the newer question into the older question, so I can't really migrate @@3825…