Which of the following psychological statements is most authentic and scientifically valid regarding the highest learning type—'Problem Solving Learning'—propounded under Robert Gagne's 'Hierarchy of Learning Theory', and its immediate preceding stages like 'Rule Learning' and 'Concept Learning', along with their real psychological implications for students' higher cognitive abilities, logical thinking, and scientific synthesis of new rules in complex abstract situations?

According to Robert Gagne's hierarchy of learning theory, learning progresses from simple to complex in eight hierarchical steps, ranging from signal learning to the highest level of 'Problem Solving Learning'. For problem solving learning, it is mandatory that students are thoroughly proficient in lower stages such as Rule Learning, Concept Learning, and Multiple Discrimination. At this highest level, the learner combines pre-acquired skills and rules to find a logical solution to a new and complex problem, which develops higher-level cognitive abilities and mental discipline.