You shouldn't assume the worst about your children
Paul is at home when his son Jim comes home and tells him he got into a fight at school.
Paul wants to discourage Jim from violence.
Paul tells Jim that no matter what occurred that violence isn't the answer and if Jim tells him the details they can talk about what to do next time.
Paul tells Jim that it's not good that he's attacking smaller children and beating them up, and he needs to stop.
Jim is eager to tell his dad the details and learn from the experience but already begins to understand that fighting is wrong.
Jim is sad that his dad thinks he was the attacker before even hearing the rest of the story and is confused how to proceed.