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.