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.