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.