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.