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Précis of Knowledge and the Flow of Information

Published online by Cambridge University Press:  04 February 2010

Fred I. Dretske
Fred I. Dretske
Affiliation:
Department of Philosophy, University of Wisconsin, Madison, WisC. 53706
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Abstract

A theory of information is developed in which the informational content of a signal (structure, event) can be specified. This content is expressed by a sentence describing the condition at a source on which the properties of a signal depend in some lawful way. Information, as so defined, though perfectly objective, has the kind of semantic property (intentionality) that seems to be needed for an analysis of cognition. Perceptual knowledge is an information-dependent internal state with a content corresponding to the information producing it. This picture of knowledge captures most of what makes knowledge an important cpistcmological notion. It also avoids many of the problems infecting traditional justificational accounts of knowledge (knowledge as [justified, true belief’). Our information pickup systems are characterized in terms of the way they encode incoming information (perception) for further cognitive processing. Our perceptual experience is distinguished from our perceptual beliefs by the different way sensory information is encoded in these internal structures. Our ropositional attitudes – those (unlike knowledge) having a content that can be either true or false (e.g., belief) – are described in terms of the way internal (presumably neural) structures acquire during learning a certain information-carrying role. The content of these structures (whether true or false) is identified with the kind of information they were developed to carry

Keywords

beliefcognitionconceptinformationintentionalityknowledgemeaningperceptionrepresentationsemantics
Type
Target Article
Information
Behavioral and Brain Sciences , Volume 6 , Issue 1 , March 1983 , pp. 55 - 63
Copyright
Copyright © Cambridge University Press 1983

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