The Interaction of World 1 and World 2
The theory of interaction between World 1 and World 2 is an alternative theory to Cartesian dualism, which is based on the theory that the universe is composed of two essential substances: Res Cogitans and Res Extensa. Popperian cosmology rejects this essentialism, but maintains the common sense view that physical and mental states exist, and they interact.
The interaction of World 1 and World 2 is also an alternative to epiphenomenalism, where World 2 objects and events are real but do not have any causal action on World 1. Popperian cosmology rejects this for the reason that "downward causation" is not possible.
Read more about this topic: Popper's Three Worlds
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