In opposition to the classical set theory of natural language, Novák's highly original monograph offers a theory based on alternative and fuzzy sets. This new approach is firmly grounded in semantics and pragmatics, and accounts for the vagueness inherent in natural language-filling a large gap in our current knowledge. The theory will foster fruitful debate among researchers in linguistics and artificial intellegence.

1. Claims and Assumptions.- 2. The Alternative Set Theory.- 3. Functional Generative Description of Natural Language.- 4. Fuzzy Logic and Fuzzy Sets.- 5. The Alternative Mathematical Model of Linguistic Semantics and Pragmatics.- 6. Comments on Possible Practical Application and Further Development.- List of Symbols.