Physicalism is also inherently a circular argument. It really gets to the root of philosophy and metaphysics, which is that at some point you reach the firmest

Physicalism is also inherently a circular argument. It really gets to the root of philosophy and metaphysics, which is that at some point you reach the firmest axioms and base assumptions that can be reasonably supported by evidence and still there is nothing stopping you from—like a 3-year-old— asking "why?" just one more time.