Before revision: In decision theory, the sure-thing principle states that a decision maker who would take a certain action if he knew that event E obtained , and also if he knew that the negation of E obtained , should also take that same action if he knows nothing about E. The principle was coined by L.J.
After revision: In decision theory, the sure-thing principle states that a decision maker who would take a certain action if he knew that event E has occurred , and also if he knew that the negation of E has occurred , should also take that same action if he knows nothing about E. The principle was coined by L.J.