Study experience as it is lived. Bracket your assumptions and describe what appears.
Fills both slots
Phenomenological Ontology + Phenomenological Epistemology
Key thinkers: Edmund Husserl, Martin Heidegger, Maurice Merleau-Ponty
The longer story
Phenomenology is the deep dive into lived experience. You're committing to Husserl's method: bracket your assumptions and describe what actually appears to consciousness.