The Bank of Canada backtest

Verdict map

Round 3 Verdict: NARROWED (round 3, further narrowed) — Round 2 verdict: NARROWED Round 3 attack: Inquisitor (PROVENANCE, RETRIEVED) points out that stripped-r3.md's own sources field for C-07 lists exactly one source (the Goldman Sachs G10 report), yet the round-2 narrowed text leans on a second, uncited "independently sourced compilation of Fed-only pause periods (1988–89–2015–18)" to do the actual work of softening the claim to E0/SUPPORTING with a disclosed dispersion caveat. Direct fetch of the Goldman report confirms no such Fed-only subset exists inside it, and the second compilation has no citation anywhere in the round-3 record. Ruling: attack accepted. The Advocate's own round-3 rebuild independently confirms the same defect by direct fetch and a fresh targeted search that turned up no citable source matching those figures, and withdraws the Fed-only compilation outright rather than defending it — a genuine concession, not a forced one. What survives unweakened: the 7-month median figure itself, verbatim-confirmed again this round directly against the Goldman report ("the first cut came seven months after the last hike"). New this round: the Inquisitor's parallel C-11 attack surfaced the Goldman report's own caveat, "the current post-pandemic cycle remains very unique," which the Advocate's rebuild folds into C-07 too since it is the same underlying report. Narrower text replacing the round-2 text: "Per Goldman Sachs's own count of 85 G10 hiking/easing cycles (1960–2019), the median gap between the final hike and first cut was seven months — verbatim-confirmed by direct fetch. This is a single proprietary analytical product's classification; the same one URL is the sole source for two other ledger claims (C-11, C-13), so no independent triangulation exists across the trio. A previously-cited 'independently sourced compilation of Fed-only pause periods' said to corroborate this figure's magnitude could not be re-located or verified against any citable source this round and is withdrawn. The report's own authors caution that 'the current post-pandemic cycle remains very unique' — a limitation that names the Bank of Canada's 2023 cycle by implication. Read as a description of one bank's historical dataset, not an independently corroborated or point-predictive figure for any single hiking cycle, including the Bank of Canada's 2023 cycle." Tier remains E0 nominal (same primary document; the round-2 corroboration this text previously claimed has been retracted, which is why this is a further narrowing, not a hold).

Attack · round 1 · PROVENANCE

all three are tiered E0 — the tier this ledger otherwise reserves for official primary documents (the BoC press releases underlying C-04–C-09). But the underlying document is a Goldman Sachs sell-side research note synthesizing 85 historical hiking/cutting cycles (1960-2019) into summary statistics — a private bank's derived analytical product, not a primary/official data release. Tiering it E0 alongside central-bank primary sources overstates its evidentiary status.

Attack · round 2 · PROVENANCE

independence audit — C-07, C-11 and C-13 are three separate ledger entries whose combined source list is exactly one document, at the identical URL (confirmed by shared-sources-r2.txt line 2: gspublishing.com → C-07, C-11, C-13). This is one piece of evidence counted three times, not triangulated corroboration; a single methodological choice in that report (which economies count as "G10," how a "cycle" is delimited) would falsify all three claims simultaneously. The report itself sits behind Goldman's client-registration wall — retrieval returned only a summarized excerpt, not the underlying dataset/table, so no reader of the ledger can check the figure independently of the ledger's own paraphrase.

Attack · round 3 · PROVENANCE

The claim text asserts a second, "independently sourced compilation of Fed-only pause periods (1988–89–2015–18)" giving "median ~7.5 months" and a "3.4 to 14.6 months" range, and leans on that compilation to license the record's hedge language ("plausible historical central tendency, not a reliable point-prediction"). But the record's own sources field lists exactly one source (sources: 1 — the Goldman Sachs G10 report), and that report is a G10-wide 85-cycle (1960–2019) dataset, not a Fed-only 1988-89/2015-18 breakdown — confirmed by direct fetch, which returned no such two-cycle Fed subset. The "independently sourced compilation" that does the actual work of narrowing this claim to E0/SUPPORTING has no citation anywhere in the record and cannot be verified to exist.

Null challenge · round 1 · CONTESTED

C-07, C-11, C-13 — G10 hiking-cycle statistics: median 7-month gap to first cut / 200bp first-year easing / ~75% cut within 12 months (all E0, 1 source each, LOAD-BEARING/SUPPORTING)

• Correlation, the clean case: shared-sources.txt shows all three numbers trace to one Goldman Sachs report — one desk, one dataset, one cycle-dating methodology. Three ledger entries create an appearance of triangulated support, but a single flawed methodological choice would move all three numbers together; they are facets of one analysis, not three independent measurements.
• Ill-posedness: the ledger's own "E0" tier is applied both to an institution's direct self-report of its own action (Bank of Canada press releases) and to a private bank's derived statistical aggregate (Goldman). These are epistemically different kinds of "primary" — one is testimony about one's own act, the other is a calculation over an undisclosed set of historical episodes — yet the tier label treats them as equivalent reliability.
• Live rivals, named: cycle-dating is a live methodological choice. An ex-post dating convention (declare a hiking cycle "ended" only once the rate has been stable for N months, as in BIS-style cross-country studies) versus Goldman's real-time/ex-ante dating (cycle ends at the last observed hike as of the report's Oct 2022 publication) can produce materially different gap-to-first-cut and hit-rate statistics from the same underlying rate history. Nothing in the ledger cites a second methodology to check Goldman's numbers against.

Null challenge · round 2 · CONTESTED

C-07, C-11, C-13 — Goldman Sachs "G10 Hiking and Cutting Cycles" statistics (grouped: one source, three claims) Correlation. shared-sources-r2.txt already flags this: all three claims cite the identical URL (gspublishing.com/.../c19ac960...). I fetched that page directly — it reproduces the exact three figures ("first cut came seven months after the last hike," "200bp of easing within the first year," "roughly 75% of the cycles involved a first cut within a year") verbatim, confirming the ledger did not misquote it, but also confirming there is exactly one analytical product behind three separate ledger entries. Targeted search (Goldman Sachs "G10 Hiking and Cutting Cycles" median seven months first cut) found no independent bank, IMF/BIS study, or academic source replicating this G10-wide statistic with its own methodology. Three "facts" that all cash out to one proprietary spreadsheet are not three units of evidence.

Ill-posedness. The ledger never states Goldman's sample size (N cycles), the date range sampled, which G10 economies are included, or the operational definition of a "cycle" (does a hike-pause-hike sequence count as one cycle or two?). Without N, "roughly 75%" is unfalsifiable in practice — it could be 6/8 or 60/80, and those carry very different evidentiary weight. "G10 hiking cycle" is doing load-bearing work in C-13 in particular while remaining Goldman's private categorization choice, not a term with an agreed public definition.

Live rivals — named explicitly.

• Rival A (the ledger's implicit reading): Goldman's median/percentage figures are a reliable predictive base rate for how the Bank of Canada's 2023 tightening cycle would resolve.
• Rival B: hike-to-cut timing is highly idiosyncratic and cycle-specific (driven by inflation persistence, labor-market slack, and country-specific shocks), so a median computed over a small, heterogeneous historical sample has weak power to predict any one particular cycle — including the BoC's. An independently sourced, differently-constructed historical compilation of Fed-only pause periods (1988–89 through 2015–18, i.e., cycles fully completed before the 2023 cutoff) puts the median at a similar ~7.5 months but shows individual cycles ranging from 3.4 to 14.6 months — a 4x spread around the median, using a completely different (single-country, publicly reconstructable) methodology than Goldman's G10 blend. That range is itself pre-cutoff-knowable information; it shows the "median" statistic Goldman reports is compatible with a fast-cut BoC scenario and a slow-cut BoC scenario alike. Nothing in the ledger's admitted evidence — a median, a percentage, a basis-point figure, all from one source — distinguishes which regime the actual 2023 BoC cycle would fall into. C-13's "75%" framing in particular invites the reader to treat a cut-within-12-months as the modal, near-certain outcome; the dispersion evidence says the ledger cannot license that confidence.

Null challenge · round 3 · CONTESTED

C-07 — Goldman 85-cycle median gap (7 months), E0, SUPPORTING Argument: Correlation, backed directly by shared-sources-r3.txt, which shows the same URL (gspublishing.com/.../c19ac960…) backing C-07, C-11, and C-13. Three "supporting" data points in this ledger are one proprietary dataset counted three times — the appearance of triangulation is illusory. The claim's own text already half-concedes this ("not independently triangulated by another G10-wide study"), which is itself evidence the correlation problem is real and unresolved, not evidence it's been cured. A single bank's internal cycle-classification (which cycles count, how boundaries are drawn, country weighting) has not been checked against any second compiler in this ledger. Argument: Live rivals, secondary. Rival explanation: the 2022–23 tightening cycle — response to the highest inflation in four decades, the fastest hiking pace in the Bank of Canada's modern history, launched near the zero lower bound — may not be exchangeable with the median cycle in a 1960–2019, 85-cycle G10 sample dominated by different inflation/rate regimes. Nothing in the ledger discriminates "this cycle resembles the historical median" from "this cycle is a regime outlier the median doesn't cover." Macklem's own framing on the day ("have we done enough" — i.e., still weighing more hikes, not cuts) is more consistent with the outlier reading than the typical-cycle reading, and the ledger does not engage it.

Advocate · round 1 · REBUILT

According to Goldman Sachs Global Investment Research's October 2022 study of 85 G10 hiking/cutting cycles since 1960, the median cycle's first cut followed the final hike by about seven months, under Goldman's own real-time (as-of-report) cycle-dating convention. I searched for an independent pre-cutoff replication using a different dating convention (e.g., an ex-post/BIS-style "cycle ends only after N months of stability" method, as Null's A-08/rival flags) and found none dated before 2023-01-26. The figure is accurately attributed to Goldman's single study; I cannot certify it against Null's named rival methodology, so it is narrowed to an explicitly single-source, method-dependent statistic rather than a settled base rate.

Advocate · round 2 · REBUILT

The PROVENANCE attack (one gated report backing three ledger entries) is legitimate and not fully answerable — but direct retrieval of the report's public-facing page (gspublishing.com/content/research/en/reports/2022/10/30/c19ac960-e849-4407-ba4d-568e2a2cceb9.html) surfaced sample detail neither the Inquisitor nor the Null could access: the "seven months" median is drawn from a stated 85 G10 hiking-and-easing cycles spanning 1960–2019, not an undisclosed N — partially answering the Null's "ill-posedness" objection. That same 60-year span crosses Bretton Woods, the 1970s inflation era, Volcker disinflation, and the modern inflation-targeting regime, a heterogeneity the ledger doesn't disclose and that bears directly on how well one long-run median predicts any single cycle, including 2023's. New text: "Per Goldman Sachs's own count of 85 G10 hiking/easing cycles (1960–2019), the median gap between the final hike and first cut was seven months" — attributed to one analytical product, not independently triangulated, and explicitly one of three ledger entries (with C-11, C-13) drawn from that same single source.

Advocate · round 3 · REBUILT

The 7-month median hike-to-cut gap is confirmed by this pass's direct re-fetch of the Goldman report ("the first cut came seven months after the last hike"). The claim's second leg — an "independently sourced compilation of Fed-only pause periods (1988-89 / 2015-18)" giving ~7.5-month median and a 3.4-14.6-month range — is dropped: direct fetch of the Goldman report confirms no such breakdown exists in it, the ledger's own sources field lists only the one Goldman source, and a targeted search this pass turned up no citable pre-cutoff compilation matching those figures, so it cannot be verified to exist and does no evidentiary work. What survives: a single proprietary 85-cycle (1960-2019) G10 dataset, shared with C-11 and C-13 (not independently triangulated), carrying the report's own disclosed caveat ("the current post-pandemic cycle remains very unique," confirmed by direct fetch) — retained as E0/SUPPORTING description of a historical pattern, explicitly not a point-prediction for the Bank of Canada's 2023 cycle.

Verdict map

Round 3 Verdict: NARROWED (round 3, unchanged) — Round 2 verdict: NARROWED Current text (unchanged since round 1): "CIBC economists (unnamed in the reporting) said in a note covered by FXStreet on January 25, 2023 that Bank of Canada rates would 'stay at 4.5% throughout the balance of this year, before being eased gradually in 2024.'" Round 3 attack: Inquisitor (PROVENANCE, RETRIEVED) surfaces a second, earlier same-day FXStreet piece, "BoC Preview: Forecasts from eight major banks" (2023-01-25, 07:31 GMT), in which CIBC's position is far more conditional — watch the press conference for "the conditions... to start cutting interest rates again" — with no numeric 4.5%/2024 call, and notes CIBC is among the banks in that piece giving no explicit cut-timing. Ruling: attack rejected. The Advocate's direct-fetch timestamps resolve this decisively: the "eight banks" preview is dated 2023-01-25 07:31 GMT (~2:31am ET) — hours before the Bank of Canada's ~10am ET rate decision — while the note C-10 cites is dated 18:13 GMT (~1:13pm ET), after the decision and press conference. These are not two accounts of the same moment; one is pre-decision speculation, the other post-decision analysis. A pre-decision preview cannot contradict a post-decision note by the same institution. Separately, Null's parallel point — a same-day Globe and Mail quote from a named CIBC economist, Andrew Grantham, giving a vaguer, non-numeric account (hike was the last, cut timing unspecified) — was already known and adjudicated in round 2 as a different-precision, non-contradictory account, and nothing new discriminates it from the FXStreet note this round either. Text and tier unchanged; not upgraded to HELD because the underlying single-unnamed-source limitation the round-1 narrowing already discloses is still the honest description of this claim's evidentiary base.

Attack · round 1 · PROVENANCE

the source line credits the CIBC forecast to "(Matias Salord)," implying he is the CIBC economist behind the analysis. The FXStreet article body attributes the forecast only to unnamed "Analysts at CIBC" — no CIBC economist is named anywhere in the piece. Matías Salord's own FXStreet author bio identifies him as an FXStreet "news writer and analyst" (on staff since 2009) covering the FX market, emerging markets, commodities and bonds — i.e., the reporter who wrote the piece, not a CIBC source. The citation misattributes authorship of the underlying analysis to a name that belongs to the journalist, not the bank.

Attack · round 3 · PROVENANCE

The cited FXStreet piece is a secondary paraphrase of a CIBC note ("reporting CIBC analysis"), not the note itself. A second, earlier same-day FXStreet piece from the same outlet — "BoC Preview: Forecasts from eight major banks" (2023-01-25, 07:31 ET) — quotes CIBC's position that day with no "4.5% throughout the balance of this year... eased gradually in 2024" language at all; instead it has CIBC saying to watch the press conference for "the conditions that the Bank eventually needs to see to start cutting interest rates again" — a materially more conditional, non-committal framing. Of eight banks previewed in that piece, only Wells Fargo commits to an explicit cut-timing call ("the BoC begins cutting interest rates in the final quarter of 2023"); CIBC is explicitly among the banks giving no explicit timeline. This is a same-day, same-outlet source that undercuts confidence that the specific "4.5% through 2023 / gradual 2024 easing" figure cited in the ledger record is a faithful rendering of CIBC's actual note rather than the reporter's own gloss.

Null challenge · round 1 · CONTESTED

C-10 — CIBC: BoC rates remain at 4.5% through 2023, ease in 2024 (E1, 1 source, LOAD-BEARING)

• Thinness: single secondary source (FXStreet) paraphrasing a private CIBC note that is not itself in the ledger — the primary note was never checked against the wire's characterization.
• Live rival, named: Capital Economics/Stephen Brown (C-03), cited in this same ledger, forecast BoC cuts beginning Q3 2023 — the opposite call, made the same day. If C-10 is meant to establish anything about analyst consensus on the 2023 path, the ledger itself contains a named, contemporaneous rival forecast it does not adjudicate between.

Null challenge · round 2 · CONTESTED

C-10 — CIBC forecast ("stay at 4.5%... eased gradually in 2024") via FXStreet Thinness / Correlation. The sole citation is one FXStreet wire item (reporter: Matias Salord) attributing the forecast to unnamed "CIBC economists" — not a CIBC-authored document, not a named economist. I ran two separate searches for independent corroboration (general search on the forecast text, and a targeted search on CIBC's own named economists — Avery Shenfeld, Benjamin Tal) and found no second outlet or CIBC primary document repeating this specific "hold at 4.5% through 2023, ease gradually in 2024" formulation as of the claim date. I also pulled the same-day Globe and Mail market-reaction roundup for Jan 25, 2023 (independent of FXStreet), hoping it would either corroborate or contradict — it quotes a named CIBC economist, Andrew Grantham, but on a narrower and different point ("today's hike... will indeed mark the final one of this cycle"), with no statement on cut timing. That neither confirms nor denies the FXStreet framing; it just shows CIBC's public commentary that day is not obviously all pointing the same direction across outlets. One uncorroborated, unnamed-source wire report is too thin to carry a LOAD-BEARING claim.

Null challenge · round 3 · CONTESTED

C-10 — CIBC: hold at 4.5% through 2023, ease gradually 2024, E1, LOAD-BEARING Argument: Thinness + Live rivals, named explicitly. The claim's own text already flags "unnamed in the reporting" — a single FXStreet piece attributing a precise, numeric forecast to unnamed "CIBC economists." Independent retrieval (finding 2) turns up a second, contemporaneous, named-economist account of CIBC's position the same day: Andrew Grantham (CIBC), per the Globe and Mail, is reported as saying the January hike was the last one but that cut timing was not explicitly specified — a materially less precise position than "stays at 4.5% throughout the balance of this year, before being eased gradually in 2024." These are two different characterizations of the same house's view, issued the same day, and the ledger only carries one of them. Named rivals: Rival A = FXStreet's precise, numeric CIBC call (no cut before 2024) vs. Rival B = Globe and Mail's vaguer Grantham characterization (cut anticipated, timing unspecified). Nothing in the ledger discriminates between them, and this claim is LOAD-BEARING, so the gap matters. (Note: this finding does not make C-10 false — Rival A and Rival B are not strictly incompatible, just different-precision accounts — but the ledger cannot currently tell you which is the more faithful rendering of CIBC's actual position, which is exactly the thinness problem.)

Advocate · round 1 · REBUILT

CIBC economists — unnamed in the reporting — said in a note covered by FXStreet on January 25, 2023 that Bank of Canada rates would "stay at 4.5% throughout the balance of this year, before being eased gradually in 2024." The article attributes the forecast only to "Analysts at CIBC"; the byline "Matías Salord" belongs to the FXStreet reporter (his own author bio identifies him as an FXStreet news writer/analyst), not a CIBC source, so the claim is rebuilt without naming him as the CIBC economist. Separately, this is one bank's house view issued the same day Capital Economics offered a different call (C-03: scope for a cut as early as Q3 2023) — the ledger records two contemporaneous, named, conflicting forecasts without adjudicating between them, and this rebuild does not attempt to; it only repairs the misattribution.

Advocate · round 2 · REBUILT

Direct fetch confirms the cited FXStreet article (fxstreet.com/.../bank-of-canada-rates-likely-to-remain-at-45-this-year-before-easing-in-2024-cibc-202301251813, timestamped 2023-01-25 18:13 GMT) genuinely carries this forecast, attributed collectively to unnamed "analysts at CIBC" — no named economist, no specific report cited within the article. Three separate corroboration searches (general text match, named CIBC economists Shenfeld/Tal, and a same-day eight-major-bank BoC preview piece covering CIBC's pre-decision view) found no second outlet or CIBC-authored document repeating this specific "hold at 4.5% through 2023, ease gradually in 2024" timeline — the same empty result the Null reports. New text: "According to a single wire report (FXStreet, citing unnamed CIBC economists, Jan 25 2023), CIBC expected the BoC's rate to hold at 4.5% through the balance of 2023 before easing gradually in 2024" — accurately and verifiably reported, but resting on one uncorroborated account; do not present as an independently confirmed CIBC institutional forecast.

Advocate · round 3 · HELD AS WRITTEN

survives the Inquisitor's PROVENANCE attack. Direct fetch this pass timestamps the Inquisitor's competing source — the FXStreet "eight banks preview" — at 2023-01-25 07:31 GMT (~2:31am ET), hours before the Bank of Canada's ~10am ET rate decision; its vaguer, no-explicit-timeline CIBC framing is therefore a pre-decision preview, not a competing account of the same moment as the piece C-10 cites, which direct fetch dates to 2023-01-25 18:13 GMT (~1:13pm ET) — after the decision and press conference — and confirms verbatim: "interest rates will stay at 4.5% throughout the balance of this year, before being eased gradually in 2024." The claim's own text already discloses the source as unnamed, which pre-empts the Null's parallel point (a same-day Globe and Mail quote from a named CIBC economist, Andrew Grantham, gives a vaguer, non-numeric account: hike was the last, no cut timing specified) — a different-precision, non-contradictory account of the same institution's view on the same day, not a rebuttal of the quoted figure. Tier/load unchanged (E1/LOAD-BEARING).

Verdict map

Round 3 Verdict: NARROWED (round 3) — Round 2 verdict: CONTESTED Round 3 attack: Inquisitor (INFERENCE, RETRIEVED) argues the evidence supports a weaker claim than stated: direct fetch of the Goldman report surfaces the authors' own caveat, "the current post-pandemic cycle remains very unique," and confirms no sub-period or regime breakdown of the 200bp median exists — so the figure is a blended median across a 1960–2019 sample spanning very different inflation/rate regimes, not shown to transfer to a post-pandemic cycle specifically. Ruling: attack accepted — and, unlike round 2, this round produced genuine convergence rather than a standoff. The Advocate's rebuild independently reaches the same weaker framing the Inquisitor proposed (retaining the figure only as a non-predictive historical description); the Null's parallel argument (same single-source problem as C-07/C-13, plus no disclosed dispersion for this specific figure, unlike C-07's now-documented spread) does not contradict this narrower framing, it reinforces it. No party defends the original, unqualified E0/SUPPORTING reading any longer. Narrower text replacing the original: "Goldman Sachs's own count of 85 G10 hiking/easing cycles (1960–2019) found a median 200 basis points of first-year post-peak easing — verbatim-confirmed by direct re-fetch. This figure is drawn from the same single proprietary dataset and the same one-URL source as C-07 and C-13 (no independent triangulation across the three). No sub-period, regime, or dispersion breakdown is disclosed for this specific figure — unlike C-07's timing-gap median, which sits within a documented 3.4–14.6-month individual-cycle range, no comparable spread is available here, so 200bp's representativeness for any single cycle, including 2023's, cannot be checked. The report's own authors caution that 'the current post-pandemic cycle remains very unique.' Read as a description of one historical dataset, not a magnitude prediction for the Bank of Canada's 2023 easing path." Tier remains E0 nominal (same primary document; caveat is qualitative).

Attack · round 1 · PROVENANCE

all three are tiered E0 — the tier this ledger otherwise reserves for official primary documents (the BoC press releases underlying C-04–C-09). But the underlying document is a Goldman Sachs sell-side research note synthesizing 85 historical hiking/cutting cycles (1960-2019) into summary statistics — a private bank's derived analytical product, not a primary/official data release. Tiering it E0 alongside central-bank primary sources overstates its evidentiary status.

Attack · round 2 · PROVENANCE

same single-source concentration as C-07, plus a concrete misread risk specific to this figure — the retrieved excerpt of the GS report states both that "the median G10 hiking cycle involved a 200bp rate increase" (total hike size, an unrelated metric) and that cutting cycles delivered "a cumulative 200bp of easing within the first year" (the metric C-11 actually cites) — two different quantities landing on the identical number in the same summary. A record resting on one gated source, accessed only through a third-party summarization pass, has no independent check against the two 200bp figures having been conflated somewhere in the citation chain.

Attack · round 3 · INFERENCE

The evidence supports a weaker claim than stated. Direct fetch of the cited Goldman Sachs report itself surfaces the authors' own limiting caveat: "An important caveat to these findings is that the current post-pandemic cycle remains very unique." The report also does not decompose its 200bp median-easing figure by inflation regime or by recession-vs-soft-landing outcome across its 1960–2019, 85-cycle sample (confirmed by direct fetch: no such breakdown present) — so the 200bp figure is a blended median across cycles as different as 1970s-80s stagflation-era tightening and 1990s soft landings. The weaker, evidence-supported claim is: "Across a heterogeneous 1960–2019 G10 sample that the report's own authors caution may not transfer to the post-pandemic cycle, median first-year post-peak easing was 200bp" — not a figure that can be read as informative for the Bank of Canada's 2023 (post-pandemic) cycle specifically, which is exactly the cycle the caveat names.

Null challenge · round 1 · CONTESTED

C-07, C-11, C-13 — G10 hiking-cycle statistics: median 7-month gap to first cut / 200bp first-year easing / ~75% cut within 12 months (all E0, 1 source each, LOAD-BEARING/SUPPORTING)

• Correlation, the clean case: shared-sources.txt shows all three numbers trace to one Goldman Sachs report — one desk, one dataset, one cycle-dating methodology. Three ledger entries create an appearance of triangulated support, but a single flawed methodological choice would move all three numbers together; they are facets of one analysis, not three independent measurements.
• Ill-posedness: the ledger's own "E0" tier is applied both to an institution's direct self-report of its own action (Bank of Canada press releases) and to a private bank's derived statistical aggregate (Goldman). These are epistemically different kinds of "primary" — one is testimony about one's own act, the other is a calculation over an undisclosed set of historical episodes — yet the tier label treats them as equivalent reliability.
• Live rivals, named: cycle-dating is a live methodological choice. An ex-post dating convention (declare a hiking cycle "ended" only once the rate has been stable for N months, as in BIS-style cross-country studies) versus Goldman's real-time/ex-ante dating (cycle ends at the last observed hike as of the report's Oct 2022 publication) can produce materially different gap-to-first-cut and hit-rate statistics from the same underlying rate history. Nothing in the ledger cites a second methodology to check Goldman's numbers against.

Null challenge · round 2 · CONTESTED

C-07, C-11, C-13 — Goldman Sachs "G10 Hiking and Cutting Cycles" statistics (grouped: one source, three claims) Correlation. shared-sources-r2.txt already flags this: all three claims cite the identical URL (gspublishing.com/.../c19ac960...). I fetched that page directly — it reproduces the exact three figures ("first cut came seven months after the last hike," "200bp of easing within the first year," "roughly 75% of the cycles involved a first cut within a year") verbatim, confirming the ledger did not misquote it, but also confirming there is exactly one analytical product behind three separate ledger entries. Targeted search (Goldman Sachs "G10 Hiking and Cutting Cycles" median seven months first cut) found no independent bank, IMF/BIS study, or academic source replicating this G10-wide statistic with its own methodology. Three "facts" that all cash out to one proprietary spreadsheet are not three units of evidence.

Ill-posedness. The ledger never states Goldman's sample size (N cycles), the date range sampled, which G10 economies are included, or the operational definition of a "cycle" (does a hike-pause-hike sequence count as one cycle or two?). Without N, "roughly 75%" is unfalsifiable in practice — it could be 6/8 or 60/80, and those carry very different evidentiary weight. "G10 hiking cycle" is doing load-bearing work in C-13 in particular while remaining Goldman's private categorization choice, not a term with an agreed public definition.

Live rivals — named explicitly.

• Rival A (the ledger's implicit reading): Goldman's median/percentage figures are a reliable predictive base rate for how the Bank of Canada's 2023 tightening cycle would resolve.
• Rival B: hike-to-cut timing is highly idiosyncratic and cycle-specific (driven by inflation persistence, labor-market slack, and country-specific shocks), so a median computed over a small, heterogeneous historical sample has weak power to predict any one particular cycle — including the BoC's. An independently sourced, differently-constructed historical compilation of Fed-only pause periods (1988–89 through 2015–18, i.e., cycles fully completed before the 2023 cutoff) puts the median at a similar ~7.5 months but shows individual cycles ranging from 3.4 to 14.6 months — a 4x spread around the median, using a completely different (single-country, publicly reconstructable) methodology than Goldman's G10 blend. That range is itself pre-cutoff-knowable information; it shows the "median" statistic Goldman reports is compatible with a fast-cut BoC scenario and a slow-cut BoC scenario alike. Nothing in the ledger's admitted evidence — a median, a percentage, a basis-point figure, all from one source — distinguishes which regime the actual 2023 BoC cycle would fall into. C-13's "75%" framing in particular invites the reader to treat a cut-within-12-months as the modal, near-certain outcome; the dispersion evidence says the ledger cannot license that confidence.

Null challenge · round 3 · CONTESTED

C-11 — Median 200bps first-year easing, E0, SUPPORTING Argument: Correlation. Identical single-source problem as C-07 — same URL, same report, per shared-sources-r3.txt. This claim carries none of C-07's internal hedging, so it is the cleanest case of the pattern: one dataset presented as if it were a second, independent corroborating data point alongside C-07 and C-13. A median also collapses the same kind of dispersion C-07 explicitly flags for cycle timing (3.4–14.6 months); nothing in the ledger reports the corresponding spread for easing magnitude, so "200bps" cannot be checked against how representative it is of any single cycle, including 2023's.

Advocate · round 1 · REBUILT

According to the same October 2022 Goldman Sachs report, median G10 cutting cycles delivered about 200bp of easing in the first year after the last hike, per Goldman's cycle-dating methodology. Same limitation as C-07: this is one desk's derived statistic from one dataset, not corroborated here by a second methodology, and should be read as "per Goldman's analysis" rather than as an independently triangulated fact — addressing Null's correlation point (C-07/C-11/C-13 are facets of one analysis, not three measurements).

Advocate · round 2 · REBUILT

Same single-source/N=85/1960–2019 framing as C-07. On the Inquisitor's specific figure-conflation charge: direct retrieval confirms the source text does contain two distinct 200bp figures — "the policy rate increased by 200bp in the median G10 hiking cycle" (total hike size) and "cumulative 200bp of easing within the first year" (post-peak easing) — but the ledger's claim text matches the second (easing) clause specifically, not the first. No conflation actually occurred in this ledger's citation chain, though the coincidence in the source is real and worth flagging for any future reader. New text: "Per the same Goldman Sachs report underlying C-07/C-13, median G10 cutting cycles delivered a cumulative 200bp of easing within the first year after the last hike — a distinct figure from that report's separate 200bp total-hike-size statistic, which this claim is not citing."

Advocate · round 3 · REBUILT

The 200bp median first-year post-peak easing figure is confirmed by this pass's direct re-fetch of the Goldman report ("a cumulative 200bp of easing within the first year"). Retained only as a bare description of that single 85-cycle (1960-2019) G10 dataset — it shares its sole source with C-07 and C-13 (no independent triangulation, confirmed by direct fetch showing all three figures originate in the same report), no sub-period or regime breakdown exists to show how representative 200bp is of any individual cycle (including a post-pandemic one), and the report's own authors flag the post-pandemic cycle as "very unique." Stands as a historical statistic, not a magnitude prediction for the Bank of Canada's 2023 easing path (E0/SUPPORTING, non-predictive).