The Knowledge relativity reference article from the English Wikipedia on 24-Jul-2004
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Knowledge relativity

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knowledge can be seen as the relation between a form of representation, (up to) two sorts of intent (communication and use goals), and (up to) three subjects (one who knows, one who is informed, and one who observes and confirms). This relational and subject-oriented view of knowledge is an alternative to the objectivist truth-based view common in logic. See the introduction of knowledge relativity as a notion