Recently, user answered this question Inequality for Distribution of points in space, but his solution was wrong. (I don't know in what detail am I supposed to explain things here since this is my first post in meta, but basically, he swapped $\sin$ with $\cos$ and then miscalculated something. If needed, I can provide more detail)
I read his answer and saw it was wrong, so I commented on that. He almost immediately erased the answer. I think it would have been better if the answer stayed there - it showed one false solution using a wrong counterexample that probably someone other would come up with, and then I commented on why it was wrong both intuitively and where it was miscalculated.
To sum up, I think it was an educative-to-read wrong solution. Is it better to erase such an answer or to leave it be?
Now for the other thing about the same question - and I have a feeling that I should maybe start a new thread regarding that issue, if yes please tell me and I will do so, but it also seems appropriate to tell it here.
One user posts a smart and correct solution saying "no" to the original question, a day after some other user posts wrong solution saying "yes" to the original question, and the guy that originally posted the question accepts the wrong solution as the correct one. It was virtually impossible he didn't see the correct reply saying "no" since it was older.
Two things are confusing me with this. Firstly, the user that came second and wrote wrong solution. I mean, he (could have) read the correct solution. Why post another wrong solution after that? Or if he thinks his is correct, why not trying to find an error in the previous solution and commenting on it?
And of course, other thing, why did the guy who posted the question accept the wrong solution? Oh, and also, since it was a question with bounty on it, and accepted answer now has 2 down votes, did he still receive the bounty?
Also, to the people that already got into New year, happy New year! To others, have a great Eve! :-)