"A" Flagged as Dupe of "B" Which was Closed as Dupe of "A"
10299
Circular duplicates in the close review queue?
91152
Feed algorithm changed? Lots of duplicates
114583
Should users be allowed to remove the "Possible Duplicate" links on closed questions?
3426
What is a "closed" or "duplicate" question?
64472
Manual "Possible duplicate of" comments are wrongly removed when question is closed
111647
How to find questions closed as duplicates via the Data Explorer
84862
Users are calling me a plagiarist. What do I do?
16251
I accidentally marked the wrong question as a duplicate. How can I replace it with the correct duplicate?
36244
Duplicate flag links in 10k tools are broken
118447
Where should I report trademark infringement or illegal SO clones?
138119
Duplicate question close reason says "already has an answer," which is often false
24930
Auto comment "possible duplicate of ..." missing on voting to close as duplicate
143028
"out of" vs. duplicated "from"
8201
Two "offtopic" flag reasons
29817
Closed as a duplicate, but the duplicate list is empty?
22458
Add ability to flag answers as duplicates
22831
Changes to "close as duplicate" (part deux)