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Theoretical Term/Folk Psychology/Lewis/Shiffer: Theoretical Term get their meaning from the roles they play in the theory that they introduce. - Verbs for propositional attitudes get their meaning through their functional role. - Folk Psychology/Schiffer: a few years ago represented by all stringent materialists. - Today represented by no one - SchifferVsFolk Psychology: no common sense theory has the means to define belief/desires. - It would have to formulate law-like generalizations - We do not wish in everyday life to rely on psychological laws. - LewisVsVs: there must be laws covering.
SchifferVsCovering laws - solution: we attribute belief under certain conditions, even without laws. - Folk Psychology: 3 types of generalization: 1. functional roles for influencing beliefs among themselves - 2. input conditions for perception. (They cannot be part of common knowledge.). - 3. output conditions for actions. - Problem: E.g. blind people can have our belief, but not our folk psychology.
Remnants of Meaning Cambridge 1987