#G.9:2 — Problem frame

Preface node heading:g-9-2-problem-frame:105464

#What this page is

This is generated FPF reference text from the specification preface or supporting sections. It helps interpret FPF; it is not FPF Reference product documentation.

#Methodology

Use it to understand how the specification wants to be read, then return to a route, pattern, or work packet for active work. Cite generated IDs only when the wording changes the task decision.

#Content

Parity claims become non‑reproducible or non‑comparable when any of the following are implicit:

• evidence window and freshness regime,
• comparator semantics, including any normalization or comparability mapping,
• the active C.21 replay basis when DHC coordinates are compared, including the exact Characteristic, Scale, measurement definition, Method, MethodDescription or model, and time or population basis,
• reuse across distinct F.17 source-local meanings or ReferencePlanes (the obtaining relation, crossing pins, and CL penalty placement),
• dominance and PortfolioMode interpretation rules,
• gate outcomes (why a run abstained or degraded).

G.9’s role is to make these recoverable as pinned and publishable as a method of obtaining outputs (MOO) without introducing new governing spec refs.

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Last Updated: 2026-09-03 — upstream FPF commit b999972c (github.com/ailev/FPF)