Duplicates in linked and related questions
20899
Linked and Related sections contain duplicate links to questions
133813
Are duplicate chains OK, or just close directly against one canonical?
105704
Question closed as duplicate with  and also shown as "Possible duplicate"
79459
Difference in score between Linked and Related questions - is it caching, or a bug?
106883
Auto-flag duplicates of deleted questions for reopening / deletion
117693
How are "related" questions selected?
133887
Are questions closed as duplicates ever automatically deleted?
2851
Is it encouraged to intentionally post duplicates for searchability?
70074
How to handle a deliberate duplicate question
35162
Duplicate questions without answers
46526
Duplicate question etiquette: to delete or not to delete?
39619
Infinite keyword duplication
52526
Circular duplicates strike again
102097
How to find all questions that were duplicates of another question?
38594
Don't automatically edit the post to insert "possible duplicate" links
117496
Let the duplicate questions finder consider tags
142226
Why can we delete the duplicate link?