For me the most interesting parts are the first (comprehension) and the second (reasoning). The third part "doing of the math" sounds more of a procedural thing

For me the most interesting parts are the first (comprehension) and the second (reasoning). The third part "doing of the math" sounds more of a procedural thing, which is important for exams but otherwise very meh. What would be really cool though is if we could see more details about whar happens in the second phase. When does the correct solutino "click" into place? What happens before (are many hypotheses begin explored in parallel (BFS-like), or does the brain follow one track at a time (DFS-like)... Also interesting would be to quantify the metabolic cost (in watts) for different types of problems. Does "thinking hard" really require more energy or is it an illusion?