Bechtel and Mundale, (1999), propose that the putative
multiple realization of psychological functions is the product of a kind of
trick. They suggest that defenders of MR
type psychological properties at a coarse grain and potential realizer properties
at a fine grain. By doing this, it looks
as though the one coarse grain psychology can be realized by different many
fine grained realizers.
Ok. I’m having a
tough time following through with this metaphor. I get the idea that one might distinguish
vision, color vision, trichromatic vision, normal trichromatic vision as
psychological properties of decreasing grain.
But, how is the grain story supposed to go for the potential biological
realizers? It can’t be brain cells
(neurons + glial cells), neurons, pyramidal cells, etc. Suggestions?