I say this not as a philosopher, but as a biologist, based on findings about human perception. Instead, learning arises from what we do. It is not about finding something that is already there. Whenever there is a molecular autopoietic system, biological phenomena arise. Left hand column is the presumption of objectivity and an reality independent of the actions of the observer.
Distinctions occur in language.
There is no distinction and not distinguishing something except in language. Distinguishing anything requires an operation, an action by the observer. Lots of questions about languaging beings, distinguishing, and experience. One of the hardest things for me to explain is the notion of boundary in an autopoietic entity, yet it seems very important in Maturana's view. And, about reality.