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.