There is a famous principle, a law of differentiation, that is built into sub dualist arguments. It is called Leibniz's Law. What is this Law all about? if something $m$ has property $x,$ and some other thing $b$ does not have property $x,$ then $m$ is not equal to $b$ it is the Law of Transcendent Contradiction which holds that minds can transcend contradiction and establish any possibility $$ it is the Law of Difference, a Law which holds that multiplicity and difference is the most basic reality and that nothing is identical, nothing is ever the same in time $$ if something is physical, then tha