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C00002 00002	%expert.tex[s86,jmc]	Slides for "Some expert systems need common sense"
C00003 00003	\centerline{\bf Some Expert Systems Need Common Sense}
C00004 00004	\centerline{\bf What is Common Sense?}
C00005 00005	\centerline{Example of a Mycin rule}
C00007 00006	\end
C00008 ENDMK
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%expert.tex[s86,jmc]	Slides for "Some expert systems need common sense"
\input slide2.tex[1,jmc]
\centerline{\bf Some Expert Systems Need Common Sense}
\bigskip
A certain combination of knowledge and reasoning ability required
for successful behavior in complex environments.
\bigskip
\noindent I will discuss three things:
\medskip
\itemb what kind of knowledge?
\itemb examples of common sense knowledge.
\itemb what reasoning abilities?
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\centerline{\bf What is Common Sense?}
\bigskip
A certain combination of knowledge and reasoning ability required
for successful behavior in complex environments.
\bigskip
\noindent Common sense includes
\medskip
\itemb situations and facts about them
\itemb events and how they change situations in time
\itemb goals and their achievement
\itemb physical objects and their properties and relations
\itemb the relation between objects and their appearance
\itemb actors, their goals and their actions
\itemb some theoretical knowledge
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\centerline{Example of a Mycin rule}
\medskip
\noindent Here is the Englishy form of the rule:

\obeylines{
IF:	1)  THE STAIN OF THE ORGANISM IS GRAMNEG, AND
	2)  THE MORPHOLOGY OF THE ORGANISM IS ROD, AND
	3)  THE AEROBICITY OF THE ORGANISM IS AEROBIC
THEN:	THERE IS STRONGLY SUGGESTIVE EVIDENCE (.8) THAT THE CLASS OF
	THE ORGANISM IS ENTEROBACTERIACEAE}
\medskip
\noindent The LISP form of the same rule:

\obeylines{
PREMISE: (\$AND  (SAME CNTXT GRAM GRAMNEG)
		 (SAME CNTXT MORPH ROD)
		 (SAME CNTXT AIR AEROBIC))
ACTION:  (CONCLUDE CNTXT CLASS
	 ENTEROBACTERIACEAE TALLY .8)}
\medskip
\noindent taken from page 107 of

\noindent {\bf Shortliffe, Edward H. (1976)}:
Computer-Based Medical Consultations: MYCIN, American Elsevier, New York, NY.

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\end