184 INFORMATION RETRIEVAL SYSTEMS

The IR system can 'answer' questions only if the questions are properly cued to the data-bank: it can't handle eccentricly formulated queries. Furthermore, each group of language-users has to custom-make their IR system. As such, it demands (a) a high degree of indexical rigidity and (b) an extensive thesaurus.

-> Language environment 201; Semantics 317; Thesaurus 353;

& Ambiguity 4, 10; Autonomy 56, 58, 60; Lexicographer 219; Meaning 235, 237; Practical 272, 273, 275;

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