Several of my questions can be summarized as "I was trying to do A but the closest I can come is B. Is A even possible? If so how?"
The usual response to this is a few people telling me to do B or something very similar to it. I never get anything that says I can't do A and should do B just that I can do B which I already knew. I'll reply saying something like I'm looking for A not B and then after a matter of hours the responses stop all together. Sometimes people will vote for the answer telling me to do B but I don't usually accept the answer as my question hasn't actually been answered.
I usually end up sticking with B but hoping someone will post something that will help me do A someday. If I accept any of these "answers" then I'm not likely to get a answer about A. Once I tried putting a bounty on the question which resulted in no new answers and forced me to mark the question as answered even though it wasn't.
My question is when, if ever, should I give up and accept the lack of someone saying A is possible as proof that it is not and how should I "answer" the question? Should I mark one of the answers telling me to do what I'm already doing as the accepted answer? Should I post my own answer saying that it appears that it can't be done? Should I leave it without an accepted answer?