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.