What is the Nature of Reality?

Ontology, a prominent field of metaphysics in the Western philosophical background, is concerned with philosophical inquiries about the nature of reality and self-existence. Ontological challenges are also addressed in several disciplines of philosophy, such as philosophy of science, philosophy of mathematics, philosophy of religion, and philosophy of logic.

"Perceptions, opinions, and dispositions toward reality" is a common colloquial expression. It is frequently used merely as a colloquialism to indicate that the participants in discourse consent should comply or should not argue about radically divergent views of reality. All elements, conditions (physical and mental), happenings (past and present), and manifestations, whether observable or not, comprise reality.