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.