@impactology I'd argue that answering this question is close to half of mastery. Because it tells you where not to put your attention, because it remains fixed.
@impactology if interested, see also phenomenographic variation theory
https://kb.edu.hku.hk/approaches_variation_theory/
@mapto "Variation theory argues that the most effective way to help students understand a concept is to focus on providing opportunities for students to experience variation in the features of the concept that they currently take for granted"
This is very helpful thank you!
@mapto What's an invariant in skill acquisition and learning something new?