Considering the discussion on ["Unanswered questions reminder"][1] and some flags on such questions, I am proposing a more clear close reason for questions that cannot be answered:

> **Too specific or impossible to answer or to replicate.** Generally
> questions about extensions where the software developer is the only
> one who can offer a solution are off-topic because the community can
> not provide an answer to the problem. 

While not directly mentioned, clearly the time is also a factor. So this close reason should not be used in a first instance, but rather after a decent period of time in which the OP is expected to provide more details or to answer any addressed questions. 

**At least one moderator (apart from me) is required to [review][2] this close reason.**

Any feedback is of course welcome.


  [1]: https://joomla.meta.stackexchange.com/questions/172/unanswered-questions-reminder
  [2]: http://joomla.stackexchange.com/admin/flags/close-as-off-topic