{
  "visual_id": "V12",
  "title": "Which signal arrives first?",
  "classification": "analytic_toy",
  "status": "validated_within_scope",
  "experiment_ids": [
    "E08"
  ],
  "run_ids": [
    "20260927T015443415499Z-E08"
  ],
  "model_ids": [
    "homogeneous-flat-Poisson-fronts"
  ],
  "claim_ids": [
    "C08"
  ],
  "input_files": [
    {
      "path": "runs/20260927T015443415499Z-E08/causal_control.csv",
      "sha256": "e3621fd5334f0910c8a3143722c3803aaa78aaa8bd2a021682200d1bad322100"
    }
  ],
  "plotted_values": {
    "path": "V12.csv",
    "sha256": "e3621fd5334f0910c8a3143722c3803aaa78aaa8bd2a021682200d1bad322100"
  },
  "source_ids": [],
  "units": "Explicit axis labels and unit-bearing source columns; normalized quantities are defined in the caption.",
  "transformations": [
    "Saved numerical outputs only; physical interpolation, selection and normalization are described by the generator and caption."
  ],
  "uncertainty_type": "Numerical controls, published errors, and declared model/nuisance scenarios remain distinct; no biological threshold.",
  "validity_limits": [
    "A component calculation does not establish an observationally allowed complete history."
  ],
  "caption": "Analytic spacetime control with equal axis units. In the collinear light-speed case, light emitted when the front changes the source arrives with the direct front. A slower front can be preceded by that light. This is a causal restriction, not a universal ban on observing different backgrounds.",
  "alt_text": "Two spacetime diagrams compare photons with fronts moving at c and c/2. Only the slower-front example allows the changed-source signal to arrive first.",
  "render_command": "uv run --offline --frozen python run.py full render",
  "generator_sha256": "fa75ece843491c857348bd38d22cfeeae732a8bb9caa8c1921182f783c2cc6a4",
  "extension_generator_sha256": null,
  "output_sha256": {
    "svg": "6163b5812826729e90cfa643928c7c658c35eaf74bec79afc405d335a9935aad",
    "png": "247044e88f69d0299e52b2eedf72834d3eef9cea83fb5559038ff53922b351b5"
  }
}