Re: "Rule-based" systems

Will Dwinnell (76743.1740@CompuServe.COM)
Wed, 26 Aug 1998 23:22:54 +0200 (MET DST)

Ulrich Mayring wrote:
"Why do you think a rules-based system cannot adequately deal
with tactical considerations?"

Eric Dybsand responded:
"At the last CGDC, John Laird presented a lecture on the SOAR
system used to manage AI controlled air missions for a large
wargame and it is a rule-based system (over 5,200 rules in the
database). It also operated over a network of computers and did
not have to run the level of glitz we see in today's computer
games."

Yes, but that is just one instance of one type of rule-based
system. Why should we generalize that to all possible rule-based
systems? It would probably be helpful for everyone to make the
technical distinction between various types of "rule-based"
systems, just to keep the language clear. I can think of four
distinct systems off-hand:
1. simple lists of IF..THEN statements
2. decision trees
3. production systems (which can be much more involved that lists
of IF..THENs)
and
4. fuzzy rule-based systems, in which all rules fire to some
degree and whose output is composited to form the system output

-- 
Will Dwinnell

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