Archive-name: fuzzy-logic/part1
Last-modified: Fri Mar 14 11:38:33 1997 by Mark Kantrowitz
Version: 1.27
Maintainer: Mark Kantrowitz et al <>
Size: 85348 bytes, 2142 lines

;;; *****************************************************************
;;; Answers to Questions about Fuzzy Logic and Fuzzy Expert Systems *
;;; *****************************************************************
;;; Written by Mark Kantrowitz, Erik Horstkotte, and Cliff Joslyn
;;; fuzzy.faq

Contributions and corrections should be sent to the mailing list 

Note that the mailing list is for
discussion of the content of the FAQ posting only by the FAQ
maintainers. It is not the place to ask questions about fuzzy logic
and fuzzy expert systems; use the newsgroup for that. If
a question appears frequently in that forum, it will get added to the
FAQ list.

The original version of this FAQ posting was prepared by Erik
Horstkotte of SysSoft <>, with significant
contributions by Cliff Joslyn <>.  The FAQ is
maintained by Mark Kantrowitz <> with advice from Erik
and Cliff. To reach us, send mail to

Thanks also go to Michael Arras <> for
running the vote which resulted in the creation of,
Yokichi Tanaka <> for help in putting the FAQ together,
and Walter Hafner <>, Satoru Isaka
<>, Henrik Legind Larsen <>, Tom Parish
<>, Liliane Peters <>, Naji
Rizk <>, Peter Stegmaier <>, Prof.
J.L. Verdegay <>, and Dr. John Yen <> for
contributions to the initial contents of the FAQ.

This FAQ is posted once a month on the 13th of the month. In between
postings, the latest version of this FAQ is available by anonymous ftp
from CMU:

   To obtain the files from CMU, connect by anonymous FTP to  []
   using username "anonymous" and password "name@host" (substitute your
   email address) or via AFS in the Andrew File System directory
   and get the file fuzzy.faq.

You can also obtain a copy of the FAQ by sending a message to with 
   Send Fuzzy FAQ
in the message body.

The FAQ postings are also archived in the periodic posting archive on []
If you do not have anonymous ftp access, you can access the archive by
mail server as well.  Send an E-mail message to with "help" and "index" in the body on
separate lines for more information.

An automatically generated HTML version of the Fuzzy Logic FAQ is
accessible by WWW as part of the AI-related FAQs Mosaic page. The URL
for this resource is
The direct URL for the Fuzzy FAQ is

If you need to cite the FAQ for some reason, use the following format:
   Mark Kantrowitz, Erik Horstkotte, and Cliff Joslyn, "Answers to
   Frequently Asked Questions about Fuzzy Logic and Fuzzy Expert Systems",, <month>, <year>,, 

*** Table of Contents:

  [1] What is the purpose of this newsgroup?
  [2] What is fuzzy logic?
  [3] Where is fuzzy logic used?
  [4] What is a fuzzy expert system?
  [5] Where are fuzzy expert systems used?
  [6] What is fuzzy control?
  [7] What are fuzzy numbers and fuzzy arithmetic?
  [8] Isn't "fuzzy logic" an inherent contradiction? 
              Why would anyone want to fuzzify logic?
  [9] How are membership values determined?
 [10] What is the relationship between fuzzy truth values and probabilities?
 [11] Are there fuzzy state machines?
 [12] What is possibility theory?
 [13] How can I get a copy of the proceedings for <x>?
 [14] Fuzzy BBS Systems, Mail-servers and FTP Repositories
 [15] Mailing Lists
 [16] Bibliography
 [17] Journals and Technical Newsletters
 [18] Professional Organizations
 [19] Companies Supplying Fuzzy Tools
 [20] Fuzzy Researchers
 [21] Elkan's "The Paradoxical Success of Fuzzy Logic" paper
 [22] Glossary
 [24] Where to send calls for papers (cfp) and calls for participation

Search for [#] to get to topic number # quickly. In newsreaders which
support digests (such as rn), [CNTL]-G will page through the answers.
*** Recent changes:

;;; 1.19:
;;; 26-JUN-95 mk    Updated listing for American NeuraLogix; new name and
;;;                 contact information.
;;; 1.20:
;;; 13-JUL-95 mk    Added email address to hyperlogic entry.
;;; 1.21:
;;; 31-OCT-95 mk    Added URL to HyperLogic page.
;;; 15-NOV-95 mk    Updated Technical Univ of Vienna Fuzzy mailing list entry.
;;; 20-FEB-96 mk    Added entry on LPA's FLINT.

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