--- a/src/Doc/Logics_ZF/FOL_examples.thy Sun Nov 02 18:21:14 2014 +0100
+++ b/src/Doc/Logics_ZF/FOL_examples.thy Sun Nov 02 18:21:45 2014 +0100
@@ -1,4 +1,4 @@
-header{*Examples of Classical Reasoning*}
+section{*Examples of Classical Reasoning*}
theory FOL_examples imports "~~/src/FOL/FOL" begin