Answer: metaphysics

AnswerCrossword Clue
METAPHYSICSPhilosophy division
METAPHYSICSField for Aristotle
metaphysicsthe study of the principles of nature and thought
metaphysicsThe branch of philosophy that deals with the first principles of things, including abstract concepts such as being, knowing, substance, cause, identity, time, and space
metaphysicsAbstract theory or talk with no basis in reality