COMMENT ⊗   VALID 00004 PAGES
C REC  PAGE   DESCRIPTION
C00001 00001
C00002 00002	\input slide2.tex[1,jmc]
C00003 00003	\centerline{\bf MYCIN}
C00008 00004	\end
C00009 ENDMK
C⊗;
\input slide2.tex[1,jmc]
\centerline{\bf MYCIN}
\bigskip
\itemb Typical rules (in Charniak and McDermott notation):
$$\displaylines{(← (is\ ?x\ streptococcus\hbox{-}group\hbox{-}a) L1=3\hfill\cr
(and\ (sterile\ (site\ ?x))\cr
\hfill (is\ ?x\ streptococcus)\cr
\hfill (portal\ ?x\ throat).\cr}$$
\medskip
$$\displaylines{(← (is\ ?x\ neisseria) L1=5\hfill\cr
\hfill (and\ (gram\hbox{-}stain\ ?x\ neg)\cr
\hfill (morphology\ ?x\ coccus))).\cr}$$
\medskip
\itemb Limitations:
\itemxx Just one patient.
\itemxx No processes occurring in time.
\itemxx No fundamental knowledge --- e.g. doesn't know bacteria
are organisms that grow and reproduce.
\medskip
\itemb Nevertheless, systems with these limitations are useful.
\vfill\eject
\end