Many modern researchers use physicalism, the idea that everything is ultimately physical and the mind cannot be separated from the body.

Today, many neuroscientists and computer experts believe the mind and body are one. They argue that thoughts and feelings are physical things, created by the complex wiring of our brains, much like how software runs on computer hardware. However, explaining exactly how these physical brain cells create subjective feelings remains one of the hardest challenges in science, leading some to argue that consciousness is an emergent property that cannot be simplified.