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.