It seems to me like this would be needed even if there was only the model-based part: if the system has actuators, then these need to be associated with some actuators in the 3rd-person model; if the system has sensors, then these need to be associated with sensors in the 3rd-person model. Once you know every physical fact about the universe, you still need to know “which bit is you” on top of that, if you are an agent.
Self enters into the equation via the epistemic dynamics: which regularities are intrinsic to the model, and which are “intrinsic” to the frame of reference in which the input is provided.
It seems to me like this would be needed even if there was only the model-based part: if the system has actuators, then these need to be associated with some actuators in the 3rd-person model; if the system has sensors, then these need to be associated with sensors in the 3rd-person model. Once you know every physical fact about the universe, you still need to know “which bit is you” on top of that, if you are an agent.
Self enters into the equation via the epistemic dynamics: which regularities are intrinsic to the model, and which are “intrinsic” to the frame of reference in which the input is provided.