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.