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.