Separation of the body and mind is the essence of Cartesian dualism and Von Neumann was only an…
Roman Ormandy
1

Thanks for clarifying. I‘ve always thought of dualism as the belief that you need to add some extra ingredient to the physical world (whether it be a new substance or property) in order to account for consciousness (in other words, that mental states don’t supervene on physical states). But I can see how the phenomenologists you mention may have rejected dualism in a stronger way than functionalists have. There is a school of thought among AI researchers known as “embodied cognition” which has been influenced by Heideggar and Merleau-Ponty, and they would probably agree with you.