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.