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.