--- a/LINKS	Sat Jun 22 08:39:52 2019 +0100
+++ b/LINKS	Wed Jul 24 14:22:06 2019 +0100
@@ -1,3 +1,7 @@
+State by itself is quite harmless. However, mutable state is the big offender. Especially if it is shared. What exactly is mutable state? Any state that can change.
+
+====================
+
 Why functional programming?
 
 Nice article and pictures of multicores.