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Epistemology: how we came to know what we know
Metaphysics: an activity of thought that goes beyond what we perceive as reality.
Ontology: the nature of being, based on principle of sufficient reason- why any being exists rather then not
Cosmology: the inquiry concerned with the study of the origin, large-scale properties, and history of the universe
Psychology: the introspective approach to reality based on subjective experiences.
What are epistemology, metaphysics, ontology, cosmology and psychology?