Is there a policy about changing the question after a period of time has passed since asking it and when there are already quality answers?

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Who determines whether the answers are of quality? –  Gershon Gold Jul 5 '12 at 19:02
    
I think the community does. –  Double AA Jul 5 '12 at 19:24
    
How many upvotes? –  Gershon Gold Jul 5 '12 at 19:28
    
It is subjective to the community and will depend on the average population size, a factor which will change with time as the site grows. I strongly believe that the subjective aspect to this is not a fundamental problem in the system. It is up to the community to discuss and decide in each case if there are sufficient votes. –  Double AA Jul 5 '12 at 19:38
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@DoubleAA, I left it ambiguous in my answer, and therefore effectively expressed agreement with your position, but I'd suggest that if there are any upvotes on an answer, the initial presumption should be that it's valuable, unless there's some strong argument to be made that it's not. This is consistent with the standard used by the site to determine if a question is "answered." –  Isaac Moses Jul 5 '12 at 19:48
    
@IsaacMoses I thought the site only considers it 'answered' if it has 2 votes, but I might be imagining that. –  Double AA Jul 5 '12 at 23:50
    
@DoubleAA, I'm pretty sure it's 1. See meta.stackexchange.com/a/18871/179 –  Isaac Moses Jul 6 '12 at 18:38
    
Related: meta.judaism.stackexchange.com/q/703 –  msh210 Jul 25 '12 at 16:18

1 Answer 1

Once a question has an answer that is considered valuable by either the community (through upvotes) or the asker (through acceptance), no one, including the asker, ought to edit the question in a way that changes its meaning sufficiently to invalidate the existing answer. If people want to get answers to a different question, they should ask that question separately.

Otherwise, the edit invalidates valuable content and/or requires more work from answerers or the community to update the answers to keep up with the updated question.

In cases where a question is ambiguous, such that there are multiple possible interpretations of what it is asking for, it should be closed until it's edited to be sufficiently precise. The earlier this happens in the question's life-cycle, the better. If the asker notices that there are answers that either don't address the asker's intent or assume multiple interpretations of that intent, the asker should edit the question as soon as possible to be more precise and should comment to the answerers accordingly.

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