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.