41 - Applicability refers to the utility of a rule or model (Wozniak 2020), how much use you can get out of it. You create a mental model of the inside of a car such that when you get into someone elses car you are still able to drive it. You don’t get bogged down in the details and become unable to drive it because the steering wheel is a different color from yours.
In life you want to find the models that have a high applicability because what good is a model if you never use it. Exception being high value internalized models.