Restoring Node

Canonical definition

A Restoring Node is a structure added to the architecture from outside, carrying a state variable that is not already in the system and whose feedback opposes the quantity it measures, and it is the only route by which the Saddle-Node Default can be converted into a sustained corrective cycle. A candidate qualifies as a Restoring Node when three conditions hold jointly: Novelty, that it introduces a state variable with dynamics of its own rather than attenuating an existing coupling; Closure, that the variable's feedback acts on a coupling in the Internal Loop Gain; and Sign, that the action is restoring rather than amplifying. Qualification is distinct from conversion: a qualifying node alters the bifurcation type only at moderate gain and lag, and it fails to convert through under-gain, which leaves the terminus unaltered while producing every appearance of working, through over-gain, which suppresses the Observability that carries legitimate social learning, or through over-lag, which documents the Fold rather than preventing it. Because Source Opacity makes the damping quantity unmeasurable from within the architecture, a Restoring Node must be external in the measurement sense, which is to say the reading of its own state must be produced somewhere other than by itself.