--- www/philosophy/free-sw.html	2005/06/19 14:02:11	1.39
+++ www/philosophy/free-sw.html	2005/07/22 16:30:53	1.40
@@ -81,6 +81,12 @@
 the program.  Therefore, accessibility of source code is a necessary
 condition for free software.</p>
 <p>
+One important way to modify a program is by merging in available free
+subroutines and modules.  If the program's license says that you
+cannot merge in an existing module, such as if it requires you to be
+the copyright holder of any code you add, then the license is too
+restrictive to qualify as free.</p>
+<p>
 In order for these freedoms to be real, they must be irrevocable as
 long as you do nothing wrong; if the developer of the software has the
 power to revoke the license, without your doing anything to give
@@ -304,7 +310,7 @@
 <p>
 Updated:
 <!-- timestamp start -->
-$Date: 2005/06/19 14:02:11 $ $Author: rms $
+$Date: 2005/07/22 16:30:53 $ $Author: novalis $
 <!-- timestamp end -->
 </p>
 </div>