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.