According to Piaget, which cognitive skill first emerges during the formal operational period?

Question

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Deductive reasoning first emerges during the formal operational period, according to Piaget. This stage, typically beginning around age 12, involves the ability to think abstractly, logically, and systematically, including the capability to use deductive reasoning to develop hypotheses and systematically test them.

According to Piaget, Which Cognitive Skill First Emerges During the Formal