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.