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Published online by Cambridge University Press: 02 December 2009
PERCEIVING THE WORLD THROUGH LANGUAGE
As I have described substance concepts, having these need not depend on knowing words. Preverbal humans, indeed, any animal that collects practical knowledge over time of how to relate to specific substances needs to have concepts of these. On the other hand, it is clear that language interacts with substance concepts in vigorous ways, completely transforming the conceptual repertoire. Putnam (1975) argued for what he called “the division of linguistic labor,” according to which laymen can borrow on the concepts of experts. Though offering an entirely different analysis, I will conclude similarly, that the public language plays a crucial role both in the acquisition of substance concepts and also in their completed structure.
The story so far about substance concepts seems to collide with the obvious fact that many of these concepts, both for children and adults, have been acquired without encountering the substances “themselves” but only by hearing about them. With regard to these very same substances, moreover, we are often in the position that Kripke (1972) and Putnam (1975) observed, having no unique descriptions of them in mind either, so that descriptionist theories of how extensions are determined also do not fit these cases. I will argue that this entire problem falls away if we view speech as a direct medium for the perception of objects.
It is traditional to assume that gathering information by being told things is a radically different sort of process from gathering information directly through perception.
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