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.