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.