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.