Good regulator theorem
The good regulator theorem is a theorem conceived by Roger C. Conant and W. Ross Ashby that is central to cybernetics. It was originally stated as "every good regulator of a system must be a model of that system".[1] That is, any regulator that is maximally simple among optimal regulators must behave as an image of that system under a homomorphism.
https://en.wikipedia.org/wiki/Good_regulator_theorem
A Straightforward Explanation of the Good Regulator Theorem — LessWrong
This post was written during the agent foundations fellowship with Alex Altair funded by the LTFF. Thanks to Alex, Jose, Daniel, Cole, and Einar for…
https://www.lesswrong.com/posts/JQefBJDHG6Wgffw6T/a-straightforward-explanation-of-the-good-regulator-theorem

Seonglae Cho