In this (now deleted) question a user asked about a homework problem (I assume), asking whether a particular approach to it would be valid.
Almost immediately, someone voted to close as a duplicate of this question, which states the same problem, but without any work shown. The older question had already closed as "missing context" for some days.
Is that really fair -- just because someone has asked about the problem without doing work, everyone else should have their questions about the same problem where they do work closed as duplicates?
In the present case the asker of the supposed duplicate self-deleted it shortly after -- apparently being satisfied with the answers to the PSQ. However, those other answers didn't tell him what he actually needed to know, namely that the approach he was proposing for the problem wouldn't have worked and why.