The document discusses using decision trees in mediation to help parties evaluate different outcomes of a lawsuit. It defines a decision tree as an illustration showing possible outcomes and helps parties assess costs, risks, and benefits. Decision trees provide an alternative perspective on a case by considering events, contingencies, probabilities, timelines, and costs. They can help parties, counsel, mediators, and others evaluate what "unlikely" outcomes might mean. The document outlines how to create a decision tree and responds to potential criticisms of using them.