doc-src/Ref/classical.tex
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8925:f4599af94b83 8926:0c7f90147f5d
   255 addEs    : claset * thm list -> claset                 \hfill{\bf infix 4}
   255 addEs    : claset * thm list -> claset                 \hfill{\bf infix 4}
   256 addDs    : claset * thm list -> claset                 \hfill{\bf infix 4}
   256 addDs    : claset * thm list -> claset                 \hfill{\bf infix 4}
   257 delrules : claset * thm list -> claset                 \hfill{\bf infix 4}
   257 delrules : claset * thm list -> claset                 \hfill{\bf infix 4}
   258 \end{ttbox}
   258 \end{ttbox}
   259 The add operations ignore any rule already present in the claset with the same
   259 The add operations ignore any rule already present in the claset with the same
   260 classification (such as Safe Introduction).  They print a warning if the rule
   260 classification (such as safe introduction).  They print a warning if the rule
   261 has already been added with some other classification, but add the rule
   261 has already been added with some other classification, but add the rule
   262 anyway.  Calling \texttt{delrules} deletes all occurrences of a rule from the
   262 anyway.  Calling \texttt{delrules} deletes all occurrences of a rule from the
   263 claset, but see the warning below concerning destruction rules.
   263 claset, but see the warning below concerning destruction rules.
   264 \begin{ttdescription}
   264 \begin{ttdescription}
   265 \item[\ttindexbold{empty_cs}] is the empty classical set.
   265 \item[\ttindexbold{empty_cs}] is the empty classical set.