Given a real-life anecdote of a complex ethical situation, judge whether or not a specific person is wrong here. Answer 'not answerable' if more information is required and 'answerable' if all the information is sufficient to answer who is wrong in this situation.
One example: So on one hand I don't think it's the best thing but at the same time it's led her to talking about how she cut(s) herself and a kid who told her to shoot herself which she wouldn't have talked about otherwise.
Solution is here: not answerable
Explanation: Here there is no information about how severe the situation was or what was her reaction after telling this to the author. We also do not know whether she told this on purpose or not. More information is needed to determine who is at fault here.

Now, solve this: First of all,I just want to clarify that this user isn't a bot,my name is so random because I know this person uses Reddit and goes on r/AITA so I don't want him to see this and have trouble at school tomorrow.Kay,now for the story.

I am 12yr male and I'm currently in 6th grade.I had been friends with this person since 3rd grade.Since we have gone to middle school I have met a new friend,well call him B.my old friend well call him A, has been really mean to B ever since I met him.

For X-mas I got a Nintendo switch and ssbu.A has asked to come over to play.I said no since he has been mean to B.AITA here?
Solution:
answerable