7.Homer's negligence caused an automobile accident with Bart. As a result of the collision, Bart's car collides with a telephone pole, causing the pole to fall. The falling pole then takes out some electrical power lines. The resulting power outage leaves Patty without any light in her apartment. As she fumbles in the darkness, she trips over her cat, falls, and is injured. Patty sues Homer in civil court. In order to avoid liability for negligence, Homer should argue what?