--- a/doc-src/Ref/classical.tex Thu Apr 13 15:01:35 2000 +0200
+++ b/doc-src/Ref/classical.tex Thu Apr 13 15:01:45 2000 +0200
@@ -681,7 +681,7 @@
current claset by \emph{extra} introduction, elimination, or destruct rules.
These provide additional hints for the basic non-automated proof methods of
Isabelle/Isar \cite{isabelle-isar-ref}. The corresponding Isar attributes are
-``$intro!!$'', ``$elim!!$'', and ``$dest!!$''. Note that these extra rules do
+``$intro??$'', ``$elim??$'', and ``$dest??$''. Note that these extra rules do
not have any effect on classic Isabelle tactics.