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.