Duplicate question etiquette: to delete or not to delete?
10293
How should duplicate questions be handled?
7406
When merging questions, leave the duplicate one as a placeholder
115725
Strategy for dealing with "which is faster?" questions
112760
Bug when marking a question as duplicate
71476
How to deal with duplicate answers posted long after first answer(s)
148956
Is there any value to NOT deleting my own duplicate question?
16962
Can a question be restored if the owner deletes it?
150537
Reviewing low quality posts: when to delete
127373
What's the etiquette on re-asking questions?
51087
Remove votes to close question X as a duplicate of Y if question Y is closed as a duplicate of X
106883
Auto-flag duplicates of deleted questions for reopening / deletion
116288
How can I improve questions marked as duplicate?
72565
Does deleting my own question or answer attract penalty?
133576
Should we reword the closure text for duplicate questions?
28716
Is it OK to ask a duplicate question on purpose?
48639
Why prevent duplicate questions?
130860
What to do when your question has an old, stale, unanswered duplicate?