This request was sparked by this particular question. The vote to close as a duplicate on meta, in contrast to the main site, does not require for the duplicate to have an answer. Yet, the closure message still says:
This question has been asked before and already has an answer.
...even when this is not the case. Perhaps we should either only show this particular sentence if there is indeed an answer, or remove this altogether for meta.
Note: I fear this might be a duplicate request, but I was unable to find one. (Not even one without an answer :) )