Psychophysical Reductionism without Type Identities
by Justin Tiehen
Nonreductive physicalists have a causal
exclusion problem. Given certain theses all
physicalists accept, including psychophysical
supervenience and the causal closure of
the physical realm, it is difficult to see how
irreducible mental phenomena could make a
causal difference to the world. The upshot,
according to those who push the problem, is
that we must embrace reductive physicalism.
Only then is mental causation saved.
Grant the argument, at least provisionally.
Here our focus is the conditional question:
What form should one's reductionism take if
it is motivated in part by the exclusion problem?
Must one be a type identity theorist, or
are alternative reductive views available, as
Jaegwon Kim has suggested more than once?