Let’s begin by asking “how important is the idea of categories or subjects for any learning?” Your answer to this question will partly be affected by how you see the concept of subjects. Is it a springboard for learning, or is it a dungeon, a master to be obeyed?
I think it can be helpful to distinguish between different types of subjects and even though I am going to do this, I think there is some overlap. Some types of subjects will fit in the different categories or types depending on how they are approached.
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