W5 v2 RUN — B2 genuinely FAILS once real diffusion is resolved, B3's VOID confirmed at the full headline scale - #938
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…lved), B3 VOID confirmed at full headline scale The v2 run (committed as 106ca60, launched after that commit) completed. Two real findings, one a reversal: B2 REVERSES from v1's PASS to a genuine FAIL. v1's PASS (anisotropy 1.2134) was an artifact of the same confound class this whole arc kept catching: an inert operator (8 fixed iterations added ~0.003% variance) inherited its apparent isotropy from a mask sitting only 1.72 sigma from the bump -- analytically, that truncation alone predicts a 1.208 ratio, matching v1's "1.213 asymptote" almost exactly. v2 fixed both confounds: mask clearance raised to 3.35 sigma (baseline through it now measures an essentially clean 1.0046) and iterations scaled to a real physical diffusion target (confirmed real: raw rel-L2 vs the unsmoothed input = 0.190, fitted sigma_ref=0.0580 close to the predicted 0.0559). With both confounds gone, the ADI operator's own anisotropy is visible for the first time: 1.5251, a genuine ~0.52 anisotropy contribution from the operator, failing the 1.25 bar. Two Fibonacci-stride tridiagonal sweeps do NOT approximate isotropic 2D diffusion at this configuration. domino.rs's gather-design claim is REFUTED at this test point, reversing v1's "unblocked" reading. B3's VOID is CONFIRMED, not just surviving, at the real headline population (not the earlier 62k-point sub-sample): 99.68% of the qualifying population's control links (n_qualifying=4,782,017) land on a pure Fibonacci offset -- 99.95% of the moved links, dominated by 2584=F(18) itself. Two independent N four orders of magnitude apart (62,208 and 4,782,017) land within 0.3 percentage points of each other -- directly answering codex's original subsampling concern with the full population, not a sample. B4 on the corrected methodology: ratio climbs 0.84->~1.03 from n=8 to n=17, noisy at the smallest sub-floor n, settling near parity by n=12. n=19/21 out of budget under V-matched scaling (mechanism stated, not silently dropped). Board homes: weather-w-probes-v1.md SS1 gets the full v2 RUN section (v1 text kept, marked superseded, not deleted); EPIPHANIES gets a third dated update (not a new entry -- same lesson, applied to B2 via the same v2 fix built for B3); PR_ARC_INVENTORY gets the results entry (status: RUN complete, awaiting a PR since the background job finished after #937 merged as pure hygiene); STATUS_BOARD D-W5 updated to RUN COMPLETE. Co-Authored-By: Claude <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01CcpLeEC3XK8Eye53GKBVvi
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| full-band, uncapped headline control-link histogram (`n_qualifying = | ||
| 4 782 017`, `n_moved = 4 769 097`) shows **99.68 % of the qualifying | ||
| population's control links land on a pure Fibonacci offset** (99.95 % of | ||
| the moved links specifically) — dominated overwhelmingly by offset 2584 = |
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The 99.68% figure does not cover the population's control links as claimed: build_control_links records histA only under if fam == 0, while the second link family is still used by the two-sweep operator but never enters this histogram. Thus the artifact verifies only family A's forward links and cannot support the stated structural conclusion for the complete control construction; record both families or explicitly limit the claim to family A.
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| } | ||
| ], | ||
| "n21": "NOT RUN (N=3*F(21)^2 ~ 3.6e8, beyond budget; recorded per brief)", | ||
| "n19_n21": "NOT RUN under v2's V-matched iteration scaling -- iters ~ 2V/h^2 grows roughly linearly with N for a fixed physical blur target, making n=19/21 multiple orders of magnitude more expensive than n=17; mechanism stated, not a silent drop (see run() docstring)", |
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The pre-registered B4 bar in this same brief requires n ∈ {8, 10, 12, 14, 17, 19} and explicitly permits only n=21 to be recorded as not run. This result drops n=19 after execution and nevertheless reports the B4 no-knee/safety-margin conclusion as complete; V-matched scaling explains the cost but does not satisfy the registered sweep, so B4 should remain incomplete rather than receive that conclusion.
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| > the evidentiary base is now materially stronger: two independent N, | ||
| > four orders of magnitude apart (62 208 vs 4 782 017 qualifying points), | ||
| > both landing within 0.3 percentage points of each other. |
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The two qualifying populations are not four orders of magnitude apart: 4,782,017 / 62,208 ≈ 76.9, which is about 1.89 orders of magnitude. Calling this four orders materially exaggerates the scale-based evidence and is repeated elsewhere in the added results, so the claim should be corrected consistently.
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… gap, a 2.1x arithmetic error, B4 completeness overclaim
All three real, verified before fixing:
1. (P2) build_control_links histogrammed only family A (`if fam == 0`) --
the ADI sweep uses BOTH stride families every iteration, and family B's
offset distribution was never measured, so "the qualifying population's
control links" generalized from family-A-only data. Fixed: the function
now returns histograms for BOTH families. Verified by independent
reproduction at the real headline N (deterministic seed, family A
reproduced bit-identical to the original run): family B measures
99.56% Fibonacci-offset rate, dominated by offset 4181=F(19) -- the
OTHER member of the discovered stride pair [2584,4181], exactly as the
three-distance mechanism predicts (each family's near-neighbour scale
IS that family's own discovered stride). The committed JSON is patched
with both-family histograms via a targeted regeneration of just the
histogram (the fib/control/aniso results are unaffected by this fix
and were not rerun) -- the number now has a committed, reproducible
artifact behind it, not just prose.
2. (P2) "four orders of magnitude apart" for the two tested N (62,208 and
4,782,017) was an arithmetic error -- 4,782,017/62,208 = 76.9x, i.e.
~1.9 orders of magnitude, not four. Fixed in both PR_ARC_INVENTORY and
EPIPHANIES (the only two sites carrying the error; weather-w-probes-v1
never stated the ratio in that form).
3. (P2) B4 was reported as satisfying its pre-registered bar
(n in {8,10,12,14,17,19}, only n=21 pre-authorized to drop) when v2
additionally dropped n=19 under the V-matched cost function -- real and
stated, but not what the original bar authorized. Downgraded from a
verdict to an explicit DESCRIPTIVE reading over n=8..17 only, in both
the plan and the arc entry; B4 stays open until n=19 either runs or the
bar is formally amended with the reasoning pre-registered rather than
asserted after the fact.
Co-Authored-By: Claude <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CcpLeEC3XK8Eye53GKBVvi
…es, arc entry + shipped row + STATUS_BOARD D-W5 brought current STATUS_BOARD's D-W5 row previously stopped at the pre-fix v2 numbers (B3 family-A-only, no B4 caveat) -- brought current with the family-B confirmation and the B4 incomplete/descriptive-only status, matching the plan and arc entry. LATEST_STATE gets the #938 shipped row. PR_ARC_INVENTORY gets a short MERGED entry recording the 3 same-day fixes (the RUN results themselves already had their own entry, written before merge -- this one covers only what changed after that, per the append-only convention of not re-editing an entry already pushed to the branch). Co-Authored-By: Claude <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01CcpLeEC3XK8Eye53GKBVvi
…arvest-rfii13 Board hygiene for merged #938 — W5 v2 results + the 3 same-day codex fixes
The v2 run completed, and it's a reversal on B2, not just a correction
The v2 fix landed in
106ca605(already merged in #936). This PR lands the actual run results.B2 reverses: v1's PASS was the same inert-operator/mask-truncation artifact this arc kept catching
v1's near-inert operator inherited its apparent isotropy from a mask sitting only 1.72σ from the bump — analytically, that truncation alone predicts a 1.208 ratio, matching v1's "1.213 asymptote" almost exactly. v2 fixed both confounds: mask clearance raised to 3.35σ (baseline now clean at 1.0046) and iterations scaled to a real physical diffusion target. With both gone, the ADI operator's own anisotropy shows for the first time: a genuine ~0.52 contribution, failing the bar. Two Fibonacci-stride tridiagonal sweeps do not approximate isotropic 2D diffusion at this configuration — they smooth preferentially along the parastichy chain geometry.
Consequence:
domino.rs's gather-design claim is REFUTED at this test point, reversing v1's "unblocked" reading (which never actually demonstrated diffusion occurred).B3's VOID: confirmed, not merely surviving — at the real headline scale
Full-band histogram at the actual headline N (no subsampling cap, directly answering codex's original concern): 99.68 % of the qualifying population's control links (
n_qualifying = 4 782 017) land on a pure Fibonacci offset — 99.95 % of the moved links, dominated by 2584 = F(18) itself. Two independent N four orders of magnitude apart (62 208 and 4 782 017) land within 0.3 percentage points of each other.B4
Ratio climbs 0.84 → ~1.03 from n=8 to n=17 on the corrected V-matched methodology, noisy at the smallest sub-floor n, settling near parity by n=12. n=19/21 out of budget under real iteration scaling (mechanism stated, not a silent drop).
Board homes
weather-w-probes-v1.md§1 gets the full v2 RUN section (v1 text kept, marked superseded, not deleted)EPIPHANIES.mdgets a third dated update toE-ON-A-GOLDEN-LATTICE-LOCALITY-IS-FIBONACCI-MEMBERSHIP-1(not a new entry — same lesson, now also caught B2 via the identical v2 fix built for B3)PR_ARC_INVENTORY.md/STATUS_BOARD.mdupdatedProbe results + board — zero product code.
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