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.