Let's say that someone only gives a hint and someone else, perhaps even the asker, then creates a full solution based on it. Which of the answers should be the accepted one?
On the one hand, it should be the full solution because it is the solution and should be marked as such, on the other hand, the original insight deserves credit.
What do you think?
Check my question for a specific example: Listings: different counters for different listing environments