diff -r e7c7431f91b2 Doc/reference/executionmodel.rst
--- a/Doc/reference/executionmodel.rst	Fri May 15 09:12:58 2015 +0200
+++ b/Doc/reference/executionmodel.rst	Fri May 15 10:19:04 2015 +0200
@@ -144,10 +144,11 @@
 in the same block.  If the nearest enclosing scope for a free variable contains
 a global statement, the free variable is treated as a global.
 
-A class definition is an executable statement that may use and define names.
-These references follow the normal rules for name resolution.  The namespace of
-the class definition becomes the attribute dictionary of the class.  Names
-defined at the class scope are not visible in methods.
+A class definition is an executable statement that may use and define names. 
+Free variables follow the normal rules for name resolution, 
+while unbound local variables are looked up in the global namespace. 
+The namespace of the class definition becomes the attribute dictionary of 
+the class. Names defined at the class scope are not visible in methods.
 
 
 .. _dynamic-features: