How can a question be marked duplicate by two users?
67170
Increase close vote weight for gold tag badge holders
38992
Is the duplicate answer flags raised for exact copies of answers of different users?
70074
How to handle a deliberate duplicate question
100366
What is best way to find duplicate questions?
114583
Should users be allowed to remove the "Possible Duplicate" links on closed questions?
44211
Duplicate notification for the same reputation event after editing question title
47388
How can I bump other users' unanswered questions?
1663
Allow same user to add multiple links as possible duplicates
4056
Can we clarify to the OP that their question is not yet closed and the duplicates are only suggestions?
135386
Should bug-report/feature-request *questions* that duplicate Grab-bag *answers* be closed as duplicates?
36608
How can I cancel an edit I made on another user's question or answer?
71646
Duplicates of an outdated question
81134
What decides what to prepend the duplicate question list with on a duplicate question?
156012
Same question listed twice in reputation list
130608
Why can we flag/vote a question on Meta as duplicate of another question which has no accepted/upvoted answers?
138119
Duplicate question close reason says "already has an answer," which is often false
77534
Best practice for marking own questions that could belong on another/multiple sites