Is Heuristic Knowledge Explanatory Knowledge?

The word explanatory knowledge means all kinds of knowledge and it ruins the distinction that makes the term not useful anymore. When I think of explanatory knowledge, I'm thinking of a subset of knowledge. A painter's skill isn't something that you is theoretical. You don't teach a painter most of their skill theoretically. You teach it by having them do it until the brushstrokes come easily. Now they do teach theoretical knowledge for art. But if I were to go out and ever to learn all the theoreticalknowledge for art that exists, all the explanatory knowledge for art, I would still be a terrible artist. In fact, it wouldn't help me much at all until I actually start practicing with