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.