Before revision: Spohn explains how the ranking theory was born:Spohn, Wolfgang, 2012, The Laws of Belief: Ranking Theory and Its Philosophical Applications, Oxford: Oxford University Press Nagative ranking function A negative ranking function assigns an ordinal number to each member of the set of possibilities, the numbers show how much each world is far from the actual world from the agent's point of view.
After revision: Spohn explains how the ranking theory was born:Spohn, Wolfgang, 2012, The Laws of Belief: Ranking Theory and Its Philosophical Applications, Oxford: Oxford University Press Negative ranking function A negative ranking function assigns an ordinal number to each member of the set of possibilities, the numbers show how much each world is far from the actual world from the agent's point of view.