Geoff said:
In this case there is only a proximal P1 cause (your noumenal brain) instead of there also being a distall P1 cause (a chair).
And proximal P1 causes are in category P2? If so, category P2 needs a crisper definition.
a) Every single mental/subjective/folk-psychological term has now been replaced with a term which is purely objective/physical/neural.
or
b) Not every single mental/subjective/folk-psychological term has now been replaced with a term which is purely objective/physical/neural.
(a) and (b) are mutually exclusive.
If (a) is true then eliminative materialism is true.
If (b) is true then there must be a non-physical element to mental realm, which means all forms of materialism are false.
Even without
eliminative materialism, materialism already requires us to replace every folk term with one that has only physical references. What is there left for eliminative materialists to do?
(a) They could claim that regular materialists are liars about everything being physical.
(b) They could advance the program that materialism already requires, under the assumption that regular materialists have been lazy about it.
(c) They could make the additional claim that there is nothing for, say,
pain to refer to, not even something wholly physical.
(a) is unlikely. (b) is useful but does not distinguish eliminative materialism ontologically. (c) leads to ridiculous scenarios such as the one I presented. Note that if (c) is the case, we should never have noticed pain at all.
So I think eliminative materialism is (b), any statements from eliminative materialists notwithstanding.
The comparison of folk terms to phlogiston is misleading. Granted, there turned out to be no such thing as phlogiston. However, the problem that phlogiston was meant to solve was a real problem, and
another solution was found. That solution happened not to be called phlogiston, whereas the solution to the sun appearing in the morning continued to be called the sunrise. There is no deep meaning to this difference. It is possibly due to phlogiston being a noun and sunrise being a verb.
~~ Paul