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.