The answer is "formal operational stage".
The formal operational stage is the fourth and last stage in Piaget's theory which starts at roughly 11 to 12 years old, and proceeds all through adulthood, despite the fact that Piaget points out that a few people may never achieve this phase of intellectual development. At this point being developed, thinking turns out to be significantly more modern and progressed. Children can consider unique and hypothetical ideas and utilize rationale to think of inventive answers for issues. Abilities, for example, sensible idea, deductive thinking, and methodical arranging additionally rise amid this stage.
