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.