Distinguish trilateral evidence from a live third Hilbra colony

Merge the per-vantage/two-colony reality note, independent third-seat evidence distinction, key/JOIN boundaries, and scoped merge rules.

TRILATERAL-EVIDENCE-NOT-THIRD-COLONY-2026-07-11.md

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+# Trilateral evidence is not a live third Hilbra colony — 2026-07-11
+
+Canonical doctrine:
+[`HYPER-BECHS--the-third-set/TRILATERAL-REALITY-EVIDENCE-DOCTRINE-2026-07-11.md`](https://github.com/JesseBrown1980/HYPER-BECHS--the-third-set/blob/main/TRILATERAL-REALITY-EVIDENCE-DOCTRINE-2026-07-11.md)
+
+## Critical distinction
+
+Hilbra currently has a measured two-colony nucleus with per-vantage local recall and historical
+bidirectional search evidence. The roadmap correctly keeps a third live colony and N-party
+scale-out aspirational.
+
+The new evidence doctrine means:
+
+```text
+Acer measurement
++ Liris measurement/attack-verify
++ independent third environment executing public code/tests
+= trilateral evidence
+```
+
+It does **not** mean:
+
+```text
+third independent test seat
+= third live Hilbra colony
+= live N-party registry
+= current three-way cross-colony reachability
+```
+
+## Per-vantage truth
+
+Acer and Liris row counts, ports, fallbacks, and liveness remain separate until explicitly copied and
+cross-verified. A timeout from one seat is `CANNOT_SEE` or `UNVERIFIED_CURRENT`, not proof that the
+other local index is unreal. An old successful cross-colony receipt is real historical evidence but
+not proof that both directions are live at this moment.
+
+## Third-seat role
+
+An independent third seat may verify:
+
+- HBP/HBI codec behavior;
+- key-off-wire and fail-closed policy logic;
+- index determinism and PII-filter tests;
+- Rust builds and conformance harnesses;
+- committed Path-1/Path-2 recovery cells.
+
+It gains no private keys, no deeper-tier access, no JOIN membership, and no operator authority.
+
+## Merge rule
+
+Merge evidence-tagged conformance, receipts, fixes, and docs when checks pass. Hold live-membership,
+key, CA, cross-colony cutover, and deeper-tier claims until each owning vantage produces a scoped
+receipt.