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.