{
  "title": "Quantum-Gravity Phenomenology and Comparative Status: structure map",
  "chapter": "Quantum-Gravity Phenomenology and Comparative Status",
  "kind": "structure",
  "schematic": true,
  "not_to_scale": true,
  "stages": [
    "mechanism and detector observable",
    "data and nuisance model",
    "likelihood and systematics",
    "competing explanations",
    "bound, anomaly, or detection"
  ],
  "claims": [
    {
      "object": "modified propagation",
      "required_declaration": "EFT operator, source model, and distance",
      "diagnostic": "multi-energy and multi-source likelihood",
      "licensed_conclusion": "a bound on the stated coefficient",
      "unsupported_promotion": "evidence for one UV completion"
    },
    {
      "object": "gravity-mediated entanglement",
      "required_declaration": "locality, mediation, and noise assumptions",
      "diagnostic": "classical-channel and decoherence controls",
      "licensed_conclusion": "test of mediator quantumness under assumptions",
      "unsupported_promotion": "selection of a quantum-gravity program"
    },
    {
      "object": "compact-object or cosmological signal",
      "required_declaration": "waveform or primordial model and nuisance priors",
      "diagnostic": "cross-channel and population tests",
      "licensed_conclusion": "a sensitivity, bound, or anomaly",
      "unsupported_promotion": "confirmed quantum gravity without alternatives"
    }
  ],
  "takeaway": "Quantum-gravity phenomenology begins with a mechanism and likelihood; sensitivity, bounds, anomalies, and detections have sharply different meanings."
}