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.