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-rw-r--r--Doc/lib/liboperator.tex4
1 files changed, 3 insertions, 1 deletions
diff --git a/Doc/lib/liboperator.tex b/Doc/lib/liboperator.tex
index c329009..608f101 100644
--- a/Doc/lib/liboperator.tex
+++ b/Doc/lib/liboperator.tex
@@ -86,7 +86,9 @@ Return the bitwise exclusive or of \var{a} and \var{b}.
\begin{funcdesc}{not_}{o}
\funcline{__not__}{o}
-Return the outcome of \keyword{not} \var{o}.
+Return the outcome of \keyword{not} \var{o}. (Note that there is no
+\method{__not__()} discipline for object instances; only the
+interpreter core defines this operation.)
\end{funcdesc}
\begin{funcdesc}{truth}{o}