“…Here, existence is reducible to purely physical phenomena. Reductive materialism assumes that because red appears when a particular electro-magnetic occurrence takes place, therefore red has the same meaning as "an electro-magnetic vibration having a wave-length of approximately 7100 Angstroms" (Dewey, 1945(Dewey, /1989. The second form of materialism-naturalistic materialism-shares characteristics with, but is different from, reductive materialism.…”