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.