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.