We all know of the Fastest Gun in the West problem. People answer fast, often with very little content to get early upvotes.
Why not introduce a badge that encourages complete answers?
We could remove the Enlightened badge since it encourages to answer first and improve later (why do we even have that badge) and introduce a new badge that is of some kind the opposite: It encourages posting an answer when it is complete.
A possible name would be "Spot-on match". It would be awareded if an answer reaches a score of 10 without being edited.
The only problem I see is that some users might not fix minor errors in their answer to get the badge.