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.