Answer edited to add another solution while overwriting the previous accepted solution
37753
Answer edited and approved to contain a totally different answer
13425
Vote can't be changed if answer is edited too quickly
117588
How do we encourage edits to obsolete/out of date answers?
31310
Dealing with quickly edited, copied answers?
90717
How do I combine two answers to create the best answer on stackoverflow?
137952
Allow changing votes on answers if the question is edited
87380
What to do when the correct answer to a question changes over time?
71476
How to deal with duplicate answers posted long after first answer(s)
113626
"Close as duplicate" - what if only the answer is a duplicate?
23519
Deleted accepted answer pinned as top answer
78376
Flag Answer, duplicate
22458
Add ability to flag answers as duplicates
94817
Allow me to save an answer
102781
When should I add another answer?
90406
Is it OK to add [Solved] to the title of a question?
23495
Replacing solution NDSolve
18466
Is it ok to add examples to an answer?