{
  "object": "typed endpoint pair (C,R), optionally with internal labelled boundaries",
  "outer_map": "M=R+12(C\u2212R)",
  "response": "deltaM=12deltaC\u221211deltaR",
  "pair_translation": "coefficients sum to1",
  "body_only_loss": "placement and semantic labels",
  "internal_rule": "declare uniform transport or retained subdivision",
  "source_premises": [
    "multiplier12",
    "endpoint roles",
    "proposed offering date2051",
    "whole-year cumulative1936 rather than exact1936.5"
  ],
  "limits": [
    "generated macro heads are not primary anchors",
    "144060/144900 are derived companions, not textual variants of144000"
  ]
}