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The accepted answer is the answer the question owner thought best met their needs. Accepting is encouraged but never required. This tag is for *discussing* issues related to accepted answers, not indicating that the tagged question *has* an accepted answer.
To my surprise I discovered that I can accept an answer to my question that has been closed.
I am not sure whether it is "good" or "bad", my question is whether it is an intended feature and if yes, ...
When I accept someone's answer to my questio, then this user gets +15 reputation while I get +2 reputation. What will happen if I undo my decision? And what if I further acept somebody's else answer? ...