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.