The article discusses how proving the intent of a person who breaks into a house to commit a crime can be challenging. The law has been expanded to include cases where the specific intent is unknown. The common purpose doctrine helps in cases where multiple people are involved in a crime, making it hard to determine individual responsibility. This doctrine holds all involved parties accountable if they shared a common goal and acted towards it. Despite some controversy, this approach helps in cases of mob violence where individual actions are hard to trace back to specific individuals.