About two weeks ago I asked this question on MSE: https://math.stackexchange.com/questions/1085946/when-should-i-be-doing-cohomology. (Short version: what are some ways I can tell that some sort of cohomology theory might be relevant to a piece of math not obviously about cohomology already?) It received some interest, but no responses even after I offered a bounty.

I posted it there because I'm fairly certain that it's too elementary for MO; on the other hand, I'm certain there are interesting things that can be said about it. So my question is,

Is the question above appropriate for MO? If not, are there ways I can modify it so it becomes appropriate?

(Of course, regardless of the answer, I'll wait until the MSE bounty expires before doing anything here.)

greatas a CW question, and could garner some very fine answers if allowed to survive. My own preference would be to keep the question pretty soft and not too tied down to the specific set-theoretic context that first gave rise to it in your own case (although of course you can and should mention that), because it really is of interest in mathematics much more generally. I like your short version of the question. I'll step back and let others respond, but I hope it flies (and would be slightly disappointed if it doesn't). $\endgroup$