Rational vs. Irrational vs. Arational
Stage # 1 and # 2: Novice and Advanced Beginner
Follow the Steps!
Stage # 3: Competence
Somewhat Rational, Somewhat Irrational
Moving from step-by-step -- TO -- Some intuition
In this stage you may stumble as you move between rationality and intuition
Kath and Dave are irrational because they use some step-by-step processes, but also include some intuition by thinking about a few possibilities that may occur outside of those steps.
Stage # 4 and # 5: Proficiency
Rationality can get in the way of expertise.
A person that thinks too logically in this stage may decrease the ability to do their task proficiently or expertly.