Final answer:
Cognitive development beyond Piaget's formal operational stage is referred to as Post formal operations by later psychologists.
Step-by-step explanation:
Piaget called cognitive development beyond his formal operational stage C. Post formal operations. His theory of cognitive development consists of four main stages: sensorimotor, preoperational, concrete operational, and formal operational. While Piaget did not propose a stage beyond formal operational thought, later developmental psychologists have suggested the addition of a fifth stage known as post formal thinking. In this stage, logic is integrated with emotion, and decisions are based on situations and circumstances.