It gets a result... unfortunately it's wrong. But hey, that's progress :) Lots of debugging code left in to make up for a less than ideal debugger

PHPSkills/FactorGraphs/Message.php

@@ -20,6 +20,8 @@ class Message
 
     public function setValue(&$value)
     {
+        // DEBUG
+        $selfName = (string)$this;
         $this->_value = &$value;
     }