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.