The claim
Let the offsets of CLAIM-538 be disturbed, a = a₀ + w with |w_e| ≤ η_e. Three conditions, in increasing strength:
- I, adjustable. For every w some x(w) is within tolerance. Swapping ∀w with the cycle quantifier and taking max_w cᵀw = Σ η_e|c_e| gives |cᵀa₀| + Σ η_e|c_e| ≤ Σ δ_e|c_e| for every cycle.
- II, static. One x serves every w. Then each overlap must absorb its own disturbance, so η ≤ δ, and what is left must cover the nominal holonomy: |cᵀa₀| ≤ Σ (δ_e − η_e)|c_e|.
- III, observed. The agent sees o = h(w) and picks x(o). That holds exactly when II holds within each class h⁻¹(o) of disturbances it cannot tell apart. Perfect legibility gives I; none gives II.
A30’s triangle with offsets ±0.6 shows the gap. I holds (0.6 ≤ 0.9), so each world has a compatible configuration. II fails, since edge 12 would need x₂ − x₁ in both [0.3, 0.9] and [−0.9, −0.3]. An agent that cannot tell the two worlds apart cannot select a compatible state, though one exists in each.
This is CLAIM-354’s note of 2026-11-02 made concrete: what an agent can achieve is what the policies it can carry out on what it can read achieve, not what exists state by state. CLAIM-535 states the same in general.
What it does not say
- Anything about feedback over time. The selection is one-shot.
- Anything beyond scalar overlaps.
- That A30’s moving-target example shows a gluing effect. It fails on one overlap whose target moves faster than its relative actuation; the cycle plays no part.
Note of 2026-11-03: Ben-Tal et al., read
Conditions I and II are exactly Ben-Tal et al.’s adjustable and ordinary robust counterparts (NOTE-1503). Condition III matches what the paper calls an “information basis”, which it names (p. 353) and does not develop, so III is this claim’s own result, not a citation. The paper’s in-between case, the affinely adjustable counterpart, restricts the rule’s form, not what it reads. Its Theorem 2.1 explains the gap here: an edge’s two inequalities share one disturbance, so the uncertainty is not constraint-wise.