diff --git a/enforcement-case-studies.tex b/enforcement-case-studies.tex
index c566b41..8aca1c6 100644
--- a/enforcement-case-studies.tex
+++ b/enforcement-case-studies.tex
@@ -718,7 +718,10 @@ annoyances were discovered:
 
 \section{Lessons Learned}
 
-  
+Companies that seek to redistribute copylefted software can benefit greatly
+from ThinkPenguin's example.  Here are just a few of the many lessons that
+can be learned here:
+
 \begin{enumerate}
 
 \item Even though copyleft licenses have them,