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.