2. The rule of choice We can only observe what a man choice under a certain constrain >Is the mans preference rational when we observed several choice of him? Or if his preference was rational, what rules will his choice take? lectures for Chu Kechen Honors Collegelecture5 for Chu Kechen Honors College 2.The rule of choice ➢ We can only observe what a man choice under a certain constrain. ➢ Is the man’s preference rational when we observed several choice of him? ➢ Or if his preference was rational, what rules will his choice take?