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Anthony_A
Guest
In his latest book on the philosophy of mind, “Physicalism, or Something Near Enough,” Jaegwon Kim devotes an entire chapter to the plausibility of Substance (Cartesian) Dualism. The chapter, “A Rejection of Immaterial Minds” offers a clear elaboration to the standard objection to substance dualism: mind-body interaction. The question is always raised: How can an immaterial substance interact with a physical body? Though the question alone is not a defeater, so Kim develops an actual argument against immaterial causation.
Now as I read this chapter nothing really bothered me because I’m not a substance dualist. Non-physical to physical (immaterial to material) causation is a problem for the Platonic/Cartesian substance dualist who wants to save some primitive notion of a soul, but Kim observes that the problem extends to a purely non-physical world. Mental to mental (read immaterial to immaterial) causation proves to be just as troubling as immaterial to material. Here Kim states why this is:
As it seems to me, these are the options:
Now as I read this chapter nothing really bothered me because I’m not a substance dualist. Non-physical to physical (immaterial to material) causation is a problem for the Platonic/Cartesian substance dualist who wants to save some primitive notion of a soul, but Kim observes that the problem extends to a purely non-physical world. Mental to mental (read immaterial to immaterial) causation proves to be just as troubling as immaterial to material. Here Kim states why this is:
So the crucial problem here is space-relations. If angels (I’m assuming most of us agree that angels are completely immaterial) are entirely outside of the physical world what type of spatial reference can we give to angelic interactions? Say that two angels high-five each other. If we are to give a full account of this event we have to say, or it would at least be implied, that the two angels were standing close enough to each other to slap hands and that either one or both of the angels raised their arms up and forwards and made contact with the other angel hand. But where is this other angel hand? What do mean when we say that one angel raised his hand up? These are creatures with no physical properties and existing outside of space.But what about mind-to-mind causation? Would this be any easier for Descartes? Consider a purely mental world, a world inhabited only by Cartesian souls; such a world must be possible, since souls are “substances,” that is, independent existents. Soul A acts in a certain way and so does soul B at the same time. This followed by certain changes in in two other souls, A* and B*. Suppose that actions of A and B are causes of the changes in A* and B*. But which caused which effect? If we want a solution that is analogous to case (2) above for the firing of guns and the deaths, what we need is a pairing relation R such that R holds, say, for A and A*, and for B and B*, but not for A and B*, or for B and A*. Since these entities are immaterial souls outside physical space, R cannot be, or include, a spatial relation, or any other kind of physical property or relation. The radical nonspatiality of mental substances rules out the possibility of invoking spatial relationships to ground cause-effect pairings.
As it seems to me, these are the options:
- We posit a space-like realm in which God and angels “reside” but which is ultimately not a “physical” realm.
This seems question begging (incoherent even) and ultimately reinforces the need for spatial-relations. - Say that God and angels are physical
This is an interesting option, but I don’t know how plausible it is. In his thread on a proof of God’s existence, Fosio offered an argument based on qualia to prove that God is physical. I didn’t find the argument sound (see thread for my reply), but perhaps there is a way to prove the supposed physical nature of God and angels.
- We claim agnosticism to how immaterial causation works.
This is an option I suppose, but not a very convincing or philosophically thorough response. Another point to keep in mind is that to say “We can’t know how immaterial causation works; it just does,” is question begging.