Ontology presupposes epistemology [theory of knowledge] in this sense: [i] Let there be what there is, aka reality. Ok; but what exactly is reality, what does it include? There is one and only one way to answer this, namely [ii] through what is known about reality. Lacking [ii], you or anyone else is in the Great Unknown, and so in Kant's territory:?the Ding an sich purports to be what anything is in itself;?it is the great Unknowable and so cannot be characterised, i.e. you and anyone else have no answer to the question due to [i].
Algebraic performance: what the teacher ought to know is what counts as correct performance, and what does not. In turn, so does the learner. Working through this properly requires a method. And lo: there is the critical method waiting to be used.
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