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.