Touch the exclusion surfaces.

A bound is not a magic number. It belongs to a model class. Change the assumption and the allowed region may change with it.

1. Evanescent transmission versus WKB

2. Rayleigh–Jeans versus Planck

3. Surface-state screening

4. Bell assumption ledger

Select a causal architecture. The target correlation is unchanged; what changes is whether Bell’s theorem excludes that architecture and what price the model must pay.

5. Antibunching: field bound versus event dynamics

The standard semiclassical field benchmark is g²(0)≥1. A refractory event process can produce g²(0)=0, but that does not by itself derive the process from optical matter dynamics. Switch the model to see the precise burden move.

6. HOM: move the assumption, move the benchmark

Independent weak coherent pulses carry the familiar 50% visibility ceiling. Phase-controlled classical pulses can generate near-100% HOM-like dips; the discriminating burden then moves to source conditioning and complementarity.