275 PRACTICAL Information retrieval is filled with practical problems of system construction, programming, etc. It emphasizes the set of contexts over any individual context. Philosophers, on the other hand, can deal with notions of content without any practical formulation; hence they may pay attention to the individual context. Our learning ambitions are probably practical ones.

-> A priori 26; Ambiguity 10; Context 96, 99, 102, 103; Conversational matrix 117; Ideology 171, 174; Information retrieval systems 180, 181, 184, 186; Learning 205; Opportunist Art & Language 251; Proceeding 293;

& Ambiguity 13; Anthropology 25; Art, anthropologized 35; Context 107; Conversation 110; Heuristic 142, 159, 160; Practical 273, 274; Thesaurus 353;

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