--- a/CookBook/Intro.thy	Wed Dec 17 05:08:33 2008 +0000
+++ b/CookBook/Intro.thy	Sat Jan 03 20:44:54 2009 +0000
@@ -9,13 +9,13 @@
   The purpose of this Cookbook is to guide the reader through the
   first steps of Isabelle programming, and to provide recipes for
   solving common problems. The code provided in the Cookbook is 
-  checked against recent versions of Isabelle.
+  as far as possible checked against recent versions of Isabelle.
 *}
 
 section {* Intended Audience and Prior Knowledge *}
 
 text {* 
-  This cookbook targets an audience who already knows how to use Isabelle
+  This Cookbook targets an audience who already knows how to use Isabelle
   for writing theories and proofs. We also assume that readers are 
   familiar with the functional programming language ML, the language in 
   which most of Isabelle is implemented. If you are unfamiliar with either of