Is cat rational? Is mouse rational when it run away from cat? Mouse does not exactly do some calculus and decide that it’s toward it’s best interest to run away from predators listed in his database. Yet, it rationally run away from cat. In fact, we can predict that the mouse will run away from cat with well 95% probability.
Am I rational when I pick beautiful big tities girls? Of course. The kind of men that pick beautiful big tities girl have higher reproductive success than the kind of men that pick ugly flat chested girls.