Thinking some more on Popper’s Three Worlds, here is a set of philosophical disciplines that seem to resonate with the themes of this blog.

• Phenomenology: the philosophical study or theory of phenomena as distinct from that of the nature of being
• Epistemology: the theory of knowledge, especially with regard to its methods, validity, and scope
• Ontology: the branch of metaphysics dealing with the nature of being
• Axiology: the philosophical study of the nature of value and valuation, and of the kinds of things that are valuable

I believe that one could also make a case for associations with phenomenology to the subjective, epistemology to the objective, ontology to the substantive, and axiology to the normative.

Further reading:

https://www.quora.com/What-does-ontology-epistemology-and-axiology-mean

http://cognitive-edge.com/blog/phenomenology-epistemology-ontology/

(Note that the author of the article above, David Snowden, is the creator of the Cynefin Framework.)

https://en.wikipedia.org/wiki/Phenomenology_(philosophy)

https://plato.stanford.edu/entries/phenomenology/

http://www.iep.utm.edu/phenom/

https://en.wikipedia.org/wiki/Epistemology

https://plato.stanford.edu/entries/epistemology/

http://www.iep.utm.edu/epistemo/

https://en.wikipedia.org/wiki/Ontology

https://plato.stanford.edu/entries/logic-ontology/

https://en.wikipedia.org/wiki/Axiology

https://plato.stanford.edu/entries/value-theory/

https://equivalentexchange.wordpress.com/2015/05/14/four-philosophies/

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