FPF Reference

    A.6.P:4.7 — Two-view and polarity discipline (no silent endpoint-position flips)

    Preface node heading:a-6-p-4-7-two-view-and-polarity-discipline-no-silent-endpoint-position-flips:13424

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    A RPR‑pattern SHALL specify how the same relation is expressed from both “sides” without polarity flips:

    • Either keep both endpoints visible with the same polarity-preserving token, or
    • declare explicit inverse tokens and require them for inverse prose.

    Implicit endpoint-position flips (“B validates A” without explicit inverse) are prohibited in Tech or normative prose. This is already a core rule for basedness patterns and is generalised here.

    Last Updated: 2026-06-17 — upstream FPF commit 646b0b9b (github.com/ailev/FPF)