And it's not my "own sense of reality" that proves whether or not any system is learned through subjective experience. It's common sense. It is how we learn anything that doesn't immediately work for us. If I show someone how to do something, anything, and they immediately do it as well I do it, then there is no subjective/individual experience required to successfully perform the task. It's an objective process. But if I show how to do it and the person struggles to get it, tries and tries and tries and just can't do it, says it's impossible or too hard, then there is an element they're missing, something I have that they don't when it comes to this particular task. That element is individual experience. If they keep working on it, they'll eventually learn how to do it through experience. That is subjective.