feedback               
                                      
                            
                            
                                          
 feedback  is  for making  the  process a 
 whole  lot more  messy,  to introduce  a 
 fractal in the  spice  mix... things  or 
 populations of  things  start to be self 
        referential or self eating        
 (autovore...) or spiraling in  or out... 
                                          
 in the sixties they did research  in the 
 jungle and  in  the sea  and  they found 
 that feedback does  not  give rise to an 
 equilibrium.  they were  trying to prove 
 that nature is  a tame beast.  but she's 
                   not!                   
 this  may  hold true  out  there...  but 
 maybe not in signal wizardry?  depending 
 on  your  technique,  you  might  easily 
             find recurrences.