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.