A question never really becomes closed on Quello, I believe that one of the most interesting parts of question and answer platforms is the ability to get different perspectives, and by leaving the door open to answer for an indefinite amount of time it helps promote this.
In the future there may be an option for a top answer to be selected by the asker, however, in this scenario, the question could still be answered by one.
Of course, there will be questions that have a straight answer to them, however, at the time I'm not sure that's the promoting different perspectives in the way I would like.
Got it. I was thinking this would be more like StackOverflow where once the question is answered, it would be closed and people can read the thread and also get to the solution.