--- a/primer/Primer.html	Tue Nov 15 13:50:44 2011 +0000
+++ b/primer/Primer.html	Tue Nov 15 15:57:05 2011 +0000
@@ -282,7 +282,7 @@
     </p>
     <p>
      In PROV-DM, we say there is <i>complementarity</i> between one entity and another
-     if everything that characterizes the first is also true of the second.
+     if everything that characterizes the second is also true of the first.
      So, both "the second version of document D" and "document D as stored on my filesystem"
      are complements of "document D", because they are both more specific characterizations
      of D. If a version of D stored on my filesystem is the second one, then