--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/doc-src/TutorialI/Misc/document/fakenat.tex	Wed Apr 19 12:59:38 2000 +0200
@@ -0,0 +1,8 @@
+\begin{isabelle}%
+%
+\begin{isamarkuptext}%
+\noindent
+The type \isaindexbold{nat} of natural numbers is predefined and
+behaves like%
+\end{isamarkuptext}%
+\isacommand{datatype}~nat~=~{"}0{"}~|~Suc~nat\end{isabelle}%