The construction

CASE-092 has two hypotheses, A and B, and two retrieval specialists, one better at finding evidence for each. A14 §2 reduced it to two numbers: m ∈ [−1, 1], the prevailing interpretive bias toward A, and a ∈ [−1, 1], the relative authority of the A-specialist. Near the symmetric state (m, a) = (0, 0) it wrote

(m_{t+1}, a_{t+1})ᵀ = J (m_t, a_t)ᵀ + (ξ_t, ζ_t)ᵀ, J = [[α, β], [γ, δ]],

with α the persistence of the meaning distribution, δ the persistence of authority, β the effect of authority on interpretation (the A-specialist’s retrievals push meaning toward A) and γ the effect of interpretation on endorsement (in CASE-092’s Regime A, operators are scored against the dominant interpretation, so a lean toward A raises the A-specialist’s score).

What it shows

The eigenvalues are λ± = ½[(α + δ) ± √((α − δ)² + 4βγ)]. Take α, β, γ, δ ≥ 0 and α, δ < 1, so each field alone is stable. Then λ+ is the larger eigenvalue and, since 2 − α − δ > 0,

λ+ > 1 ⇔ (α − δ)² + 4βγ > (2 − α − δ)² ⇔ βγ > (1 − α)(1 − δ).

A14’s condition is right. Three things follow, and were checked here:

  1. The loop, not either arrow, destabilizes. If βγ = 0 the eigenvalues are α and δ, both inside the unit circle. One-way coupling, however strong, leaves the symmetric state stable.
  2. The unstable direction is mixed. For β, γ > 0 the eigenvector of λ+ is (β, λ+ − α), with both components positive: the mode that grows is a combined lean of meaning and authority, not either alone. That is the object CLAIM-164 says a gap makes definite, a subspace, though A14 noted the caveat that Jacobian eigenvalues are not the singular-value gaps CLAIM-164 is about.
  3. Regime B removes it. Scoring operators by independently assessed relevance sets γ ≈ 0, so by 1 the coupling cannot destabilize the symmetric state, whatever the endorsement memory.

Near the threshold λ+ approaches 1 and its relaxation time τ = −Δt / ln λ+ grows without bound, so the mixed mode is also the slow one: the coupling makes a slow collective variable before it makes an unstable one.

What it does not show

That the nonlinear bounded system has two captured attractors (A14: it “could lead to competing stable interpretive–authority configurations”); that the signs assumed hold in any implementation of CASE-092; or that capture lowers fidelity, which is CLAIM-297’s further claim. It is the textbook instability condition for a positive 2×2 linear system, applied to this reading of the coupling. Fictional by construction.

Note of 2026-10-18: a proposed extension with demands and a feasible-update oracle

A39 §3 of the exchange of 2026-10-17 proposed extending this case as its “case study 2”: “The new experiment would add explicit competing demands and a feasible-update oracle. It would ask whether interpretation– endorsement feedback can make a system persistently fail to use an available satisfactory update.” The oracle computes the residual Φ of CLAIM-365, so the extension would separate structural from governance-induced frustration (CLAIM-357) in this model. Its key contrast, “endorsement based on independent performance evidence versus endorsement scored through the interpretations whose authority is being evaluated”, is not new: it is Regime B against the γ arrow here, and CLAIM-342’s and CLAIM-297’s thesis. A39 called it “the best candidate for an early discriminating experiment”. A40’s Study C restates it. Not run. The dynamics it would need are QUESTION-124’s.