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.