Methodology: For each multi-axis flagged actor (top 15 by meta_amp cross-axis score), federal role ranges are sourced from Canada Gazette Order-in-Council appointment notices, Parliament of Canada biographical records, and on-the-record news of record. Per-actor ranges committed to data/actor_tenures.json. Pairwise overlap in days computed via standard interval intersection. joint_score = a.meta_amp × b.meta_amp × overlap_years — higher means more consequential cross-axis concurrent period. Where one actor holds multiple simultaneous roles (Freeland: DPM + Finance; Carney: BoE + UN Envoy + Brookfield), the pair's total overlap days sum across all role-pair combinations. The algorithm is seeded and reproducible.

Top concurrent cross-axis pairs

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Single actors holding concurrent federal roles

Each card shows an actor whose federal role ranges include simultaneous portfolios. These are cross-portfolio accountability surfaces — a person in two federal roles at once. Source: data/actor_tenures.json.

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Timeline — multi-axis actors active per year

Structural finding · cross-axis + temporal

The Canadian federal accountability architecture reviews each single- actor role separately, and each single-axis separately. The temporal- overlap data shows the decision-making is in fact deeply concurrent and cross-portfolio.

Freeland held Deputy PM + Finance for 4.3+ years simultaneously. Carney held 4 concurrent roles for parts of 2020–2024 (BoE + UN Envoy + Brookfield + earlier BoC). Trudeau × LeBlanc overlapped for 11.4 role-pair-years covering the full range of LeBlanc's successive portfolios.

These are not separate decision chains. They are interlocking ones. No single Canadian federal oversight body has jurisdiction over interlocking concurrent cross-portfolio decision chains. The cross-axis ranking + temporal-overlap combined finding names that gap, adds the time dimension that a static cross-axis actor ranking lacks, and makes the gap visually obvious.

Receipts: data/actor_tenures.json (tenure dataset) · data/temporal_overlap.json (computation output) · reproducible seeded algorithm
See also: All 19 Axes · State of Investigation · Information Architecture