Does flagging a question as duplicate require that the original must have an answer?
22831
Changes to "close as duplicate" (part deux)
112760
Bug when marking a question as duplicate
28716
Is it OK to ask a duplicate question on purpose?
105704
Question closed as duplicate with  and also shown as "Possible duplicate"
61584
When is a duplicate question not a duplicate?
3685
Confirming that my own question is a duplicate by voting to close should have immediate effect
87154
What to do if an out of date question+answers already exists?
15326
Duplicate explanation should encourage improvement of original
140849
Why didn't my name show up when I marked a question duplicate?
111204
Voting and flagging comments gets enabled when loading additional comments in duplicate question
148956
Is there any value to NOT deleting my own duplicate question?
146576
Askers should be able to close their own question as a duplicate
71646
Duplicates of an outdated question
109436
Why can I flag my own question/answer?
104116
How can I know if my post(comment, answer, question) was Flagged?
18509
Does the new guidance on duplicate questions suggest closing a question as duplicate, if the original answers the OP's question?
51087
Remove votes to close question X as a duplicate of Y if question Y is closed as a duplicate of X