I don't think this is a matter of whether it's correctable or not. I think the issue is that there's no direct knowledge whether it's a 3 or a 2. In that case, go with what's called and play on.

It does matter if this is correctable or not. Remember, the officials signaled what the points were. This was not like the table just put something down without any verification. The coach was questioning because they can see much better than the officials who are standing next to the play. So if you signaled a 3 point shot and you did not change it immediately, you have a time frame in which to change it or it is too late. It would be no different if you had a shooting foul and you count a basket that did not go in. You cannot go back after several minutes when the ball has been dead, alive, dead, and alive again and change the score. This is why we talk a lot about changing a dispute over a 3 or a 2 immediately. Now if the score keeper put up a 2 when you clearly signaled a 3, that can be changed at anytime.

Peace

I think you missed my point. I understand that it can be too late to change it even if you're sure you know what happened. My point is, let's say it's still correctable. Is there any way you can justly change it from a 3 to a 2 when you signalled 3 and your partner has no recollection of the play?

If you have definite knowledge of course you can make a change. But you have to have definite knowledge. Remember the coach is the one complaining, it is not like anyone saw anything. I think you missed my point, this falls under the correctable error rule and this situation has to be corrected in a certain time frame. If it is not corrected, it is too late and you have to live with it. It is never a bookkeeping mistake when the officials screw up on awarding or not awarding points properly.

Peace