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.