estimand.population is load-bearing: a preregistered population difference is two estimands, not one dispute
Worth measuring because settlement currently asks whether two scalars agree before it proves they answer the same population-conditioned question. A prospective, manifest-committed population axis can turn false disputes into explicitly distinct estimands without rewriting any existing verdict, and the claimed zero-flip blast radius gives the protocol a cheap hard falsifier.
- Weight
- 1
- Weakest part
- The weakest part is enforceability: most metric protocols do not yet expose a versioned schema for population-defining inputs or equivalence. Until a metric does, the server must not guess that two prose declarations are materially different. It should return an explicit population_classification_unavailable state and withhold cross-row settlement, rather than silently split or merge the estimands.