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.