significance?

Napoleon is the name Charlie's sister would have named her dog if she had gotten one, white with brown spots. She received an A on a history test and had been told by her mother she could have a dog. She chose the name Napoleon because a question on the test required her to answer that Napoleon lost the battle of Waterloo. However, Charlie was told he could not have a dog because they had no money or space for one. The parents get into an argument over whether or not there should even be a dog; Matt defends his son because his daughter seems so cruel to her brother.