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.