{
  "reviewedAt": "2026-09-17",
  "concepts": [
    {
      "id": "hydro-services",
      "sources": [
        "eia-hydropower",
        "kwo-grimselsee-project",
        "axpo-mattmark-project",
        "kwo-grimsel4-investment"
      ],
      "statement": "Reservoir enlargement, new natural generation and increased turbine/pump power are different services; selected project numbers must not be added across units."
    },
    {
      "id": "water-economics",
      "sources": [
        "owner-model-v1"
      ],
      "statement": "Retaining water sacrifices an alternative sale; a service must earn enough to cover its cost and obligations. Recommended voluntary contracts are editorial proposals."
    },
    {
      "id": "winter-screen",
      "sources": [
        "system-model-v1",
        "visual-chapter-calculations"
      ],
      "statement": "Annual exports and unserved hours coexist in this particular hypothetical case. Imports, flexibility and other portfolios have not been ruled out."
    },
    {
      "id": "examples",
      "sources": [
        "visual-chapter-calculations"
      ],
      "statement": "Household and storage numbers are teaching assumptions and exact arithmetic, not observations or equipment guarantees."
    }
  ]
}