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.