1. Preference Propersition1: if 9 is rational, then x is irreflexive and transitive c is reflexive and transitive and symmetric 。fx>y%z, then x>z lecture for Chu Kechen Honors Collegelecture4 for Chu Kechen Honors College 1.Preference ➢ Propersition1: if is rational, then: ⚫ is irreflexive and transitive ⚫ is reflexive and transitive and symmetric ⚫ If % , then x y z x z %