I have an inquiry on the grounds of curiosity. The following question has been marked Community Wiki on August 31st:
From my understanding, you have a base policy that soft-question and big-list questions are Community Wiki as a means to discourage their proliferation. The above question, however, is not a soft question or big list, neither in tag nor apparently in essence (my understanding of what a soft question is, this isn't one to me, but I'm happy to admit I may not fully grasp your definition of a soft question).
It is a pretty direct question ("What does the equation of infinity minus infinity yield?") that even has a highly voted, and very illustrative, answer ("Indeterminate, as proven through comprehension"). The question is even amongst your top-voted questions, which is a nice place to see that it is otherwise populated primarily by normal questions. It seems like it would fit in nicely with all those normal questions.
As such it leaves me confused. Why is this question marked community wiki? I can find no discussion or indication as to why this question was marked as community wiki, or any policy discussion here on Meta which applies to this question.