Common Sense Knowledge Base and Outer World Interface<P>
 -- Language Engineering Approach --
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Masao YOKOTA, Masato SHIRAISHI, Seio ODA, Yasushi NISHIMURA
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Department of Communication and Computer Engineering,
Fukuoka Institute of Technology<P>
Higashi-ku, Fukuoka 811-02, Japan<P>
e-mail: yokota@cs.fit.ac.jp
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      More elaborate and systematic processing of various forms of
information about worlds, including natural language representation,
must come to require logical organization of the natural concept
system (the concept system common to human beings). We suppose that
such a system consists of three subsystems which respectively concern
(1) physical world, (2) mental world, and (3) interface between them.
Reflecting on human acquisition process of knowledge, the one relating
to the physical world is the most important and fundamental and may be
assumed as the basis of common sense reasoning, so called. This paper,
according to the assumption, discusses realization of the natural
concept system as a deductive system, formalization of common sense
reasoning and its application to natural language processing.
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Keywords: common sense reasoning, deductive system, natural language<P>