AIM Framework glossary
Salience Ceiling
Canonical definition
The Salience Ceiling is the level of realised valuation at which the slope of the valuation-to-salience mapping has fallen to zero, so that valuing an Object more draws no further notice to it. An Object can only be so salient, and the Salience Ceiling is where that limit has been reached. It is the bound that makes the inflated state a resting state in Saturation Hold, and the bound a Restoring Node holds a population below in a Governed Band. The underlying quantity is the local slope of the Observability response at the operating point, which is one of the four couplings whose product forms the Internal Loop Gain (Appendix A). Derived at Chapter 4, Section 4.4.13, where the saturation of the mapping is established; named at Chapter 20, Section 20.3.3. Distinction from the Internal Loop Gain and its threshold. The Salience Ceiling is not a second threshold standing beside the loop gain. The slope is one of the four factors whose product is the loop gain, so the ceiling is the level at which that factor reaches zero and the product collapses with it. Crossing the Critical Loop Gain and arriving at the Salience Ceiling are different events: the first is where compounding begins, the second is where compounding exhausts itself. A population climbing from the one to the other is driving one of its own loop-gain terms to zero, which is why a supercritical population can stop climbing without anything having restrained it. Distinction from the coupling that turns notice into wanting. The salience-to-M coupling is how much an Individual's wanting rises from seeing an Object valued by others. The Salience Ceiling is a limit on how much notice the Object can attract in the first place. The two sit on opposite sides of the same variable, the coupling running from Salience into wanting and the ceiling bounding the Salience available to be run from, and they move independently: a population can carry a steep coupling and still be at the ceiling, which is the Saturation Hold case. Distinction from Saturation Hold. The Salience Ceiling is a level; Saturation Hold is the condition of a system resting at it with nothing pushing back. A system can be below the ceiling and governed, below it and merely undriven, or at it and held there by exhaustion. Only the last is Saturation Hold.
Explanation
Think of an engine at maximum revs. Press the accelerator further and nothing happens, because there is nothing left to give. And an engine that has been at maximum for long enough stops being something anyone hears. It is no quieter, but it has become background noise, and it no longer tells you anything, because it never changes. An Object at the Salience Ceiling is in both of those conditions at once. It is drawing all the notice it can draw, so valuing it higher adds none, and the notice it does draw has stopped carrying information because it never varies. That variation is one of the four quantities that multiply together to decide whether comparison runs away, so a population that climbs this high stops accelerating for the simplest possible reason: the pedal has nothing left under it. Nobody applied a brake. That is why a society at the ceiling can look exactly like one being governed, and is not.
Epistemic status
Framework-Specific Construct.
Derivation
Chapter 4, Section 4.4.13.2; Chapter 20, Section 20.3.3; Appendix A, Section A.5.3.