It is generally agreed that good question should also indicate what the OP have tried. Many people do this and we receive many questions also contain the OP's attempted proof/solution for the question they are asking.
In such cases we can expect two kind of answers. Some people might answer the original question by giving a different proof/solution. Some people might expand the OP's solution, show how it can be improved/corrected, comment on some inaccuracies in the attempted solution etc.
If a question is closed as a duplicate, the OP will probably not receive feedback on their attempt in the answers. (But they still might get such feedback in comments on chat.)
So my question is:
Should a question be closed as a duplicate if the OP also provides their solution and in the question they ask whether their solution is correct? Should such question be closed if the OP specifically indicates their interest in comment on their solution using proof-verification or solution-verification tag?