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.