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.