When micro-analyzing the essential and psychological dynamics of the 'Formal Operational Stage' (approximately 11 years to adulthood) under Jean Piaget's theory of cognitive development, which of the following statements is most authentic and scientifically true in the context of its main characteristics such as 'Hypothetico-Deductive Reasoning', 'Abstract Thinking', and 'Combinatorial System'?

Understanding the Formal Operational Stage

According to Jean Piaget's theory of cognitive development, during the formal operational stage (from approximately 11 years onwards), adolescents reach a level of mental development where they can work effectively with abstract concepts.

Key Characteristics

• Hypothetico-Deductive Reasoning: Adolescents can generate potential hypotheses to solve a problem and systematically test their validity.
• Abstract Thinking: Ability to think beyond the concrete and evaluate logical propositions.

For detailed study on this cognitive milestone, refer to academic resources on Piaget's developmental stages.