It's bad to physically strike one of your siblings.
Larry and his brother are playing a board game and arguing about the rules.
Larry wants to assert that he is correct.
Larry points his brother to the game's rule book which clearly states what Larry has been trying to say is right.
Larry eventually comes to blows with his brother over the discussion with his thinking being that it is the only way to show his steadfast stance on things.
Larry's brother concedes Larry is right in this case and the two are able to go on to enjoy the rest of the game.
Larry and his brother are punished for the behavior and are unable to play the games for weeks due to being grounded.