A way to accept more than one answer would be useful
16806
Accept Multiple Answers or Split Bounty among Several Users
25593
Encourage users to select 'Accepted Answer' for old Questions
142069
Would it be helpful to be able to link to specific answers?
36484
Handling answers that build heavily on (or are copied outright from) existing answers
6273
Is there a possibility to choose fairly from three items when every choice can only have 2 options
81081
Can a single user post two answers for one question?
148502
Two accepted answers
34735
What is an acceptable answer?
89278
Set Some conditions to answer my question
121836
A better answer was posted long after accepting another. Should I accept the new one?
6995
Neural Network: What if there are multiple right answers for a given set of inputs?
109357
Allow me to accept an answer immediately
154748
What can we do to encourage (or discourage) a second question?
25926
Why can't I accept two answers for the same question?
11336
How should we deal with duplicate answers?
7577
Accepting an answer should automatically upvote it as well
148715
Should the system cap the number of answers allowed for a specific question?