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.