Just as one style of martial arts benefits mainly one area, say the feet, another is totally dedicated to the fists. To measure the growth in each of these forms, there are different ‘belts’ or levels of mastery based on what you have learned. So perhaps rationality cannot be measured in just one way; the different applications would have to have different levels, just as schools have letter grades on different subjects, and then an overall GPA. Practical usage, such as in the workplace, would have to be ‘graded’ differently than the same practical usage in a social setting.
Just as one style of martial arts benefits mainly one area, say the feet, another is totally dedicated to the fists. To measure the growth in each of these forms, there are different ‘belts’ or levels of mastery based on what you have learned. So perhaps rationality cannot be measured in just one way; the different applications would have to have different levels, just as schools have letter grades on different subjects, and then an overall GPA. Practical usage, such as in the workplace, would have to be ‘graded’ differently than the same practical usage in a social setting.