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.