A.19.UNM:9 - Consequences
Benefits
- Makes “normalize-then-compare” a first-class governance choice.
- Centralizes governing-pattern assignment, improving usability and reducing drift.
- Supports evolvability: method families can evolve via packs/extensions without mutating the mechanism surface.
- Prevents silent inadmissibility (unit, scale, and plane errors) by fail-closed guards.
Costs
- Requires explicit declarations (method instance, invariants, validity window, evidence pins).
- Class-level use requires compatibility/query arguments; ordinary transformed-value use need not construct a quotient or fix.