The document outlines several schools of philosophy including monism, idealism, occasionalism, subjectivism, and physicalism. Monism asserts there is only one fundamental kind of thing in the universe while idealism holds that only minds and ideas exist. Occasionalism rejects a causal connection between body and mind, believing God mediates all interaction. Subjectivism states that our own mental activity is the only undeniable fact and there is no objective reality. Physicalism is the view that everything is physical and supervenes on the physical.