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.