The edit function wasn't used to discredit anybody. Its usage was denied, a flame war ensued, you as mod firefighter confirmed that it was indeed used. Nobody has a problem with that.If the edit function is used (deliberately or otherwise) to discredit another poster and perpetuate a myth that they lied, leading to others jumping in, should said poster not have the opportunity to have their name cleared?
There was no need for you to go further to confirm and divulge the withdrawn content, that's my point.