Why does language matter to fuzzy logic?

This talk consists of two parts. The first part is concerned with language itself and the second part is concerned with applications of language to computing. First, it is shown that language is essentially fuzzy from both logical and philosophical points of view. As to a philosophical view to words, we can refer to a Wittgenstein's text taken from "Philosophical Investigation". Then, various uncertainties are classified into a number of categories with modalities and it is shown that there are three essential uncertainties including probability and fuzziness. Next, four major functions of language are explained, concerning human intelligence in which we can see that the fuzziness of language enables us to think in our everyday life. In the second part, an idea of everyday language computing is suggested. This is a new project that I want to promote in the next century. It implies a paradigm shift from a conventional number-based computing to language-based computing. To achieve such an intelligent computing, we need systemic functional linguistics initiated by M. A. K. Halliday. In this talk, we begin with the complexity of language and give a brief introduction to this linguistics together with an illustrative example. Some examples of everyday language computing are also shown. In concluding remarks, referring to Porty's view to 20th century as "Linguistic turn", my view is shown as "Fuzzy turn" and conclude that two turns are deeply related to each other. 0-7803-521 1-4/99/$10.00