Easy there with the words. Just because there's two of something is hardly an argument for a (mind-body) dualism [1]. Is the dichotomy cats vs dogs then proof for said dualism as well? How about vanilla vs chocolate? What do you make of the existence of a (six sided) die then?

[1] https://en.wikipedia.org/wiki/Mind%E2%80%93body_dualism

smh, have a good one.

> Outside implies an inside implies dualism

Well, unless with dualism you just mean that there are two, you are simply mistaken. Just because my car has an inside and an outside, and I cannot determine the state of its gearbox from the outside w/o the car telling me, does not mean that this implies a ghost in the machine. Far from it.