path: root/data/ef/expected-divergences-lms.sexp

; data/ef/expected-divergences-lms.sexp -- Task 6 (2026-08-21-colitur-
; celebrant-rubrics-phase1)'s cited allow-list for the LMS Ordo comparison
; (test/test_lms_ordo.ml). Extended by the Witnesses task (2026-08-22,
; same phase) from the single 2024-2025 window (2024-11-27..2025-12-31)
; to three: 2023-2024 (2023-12-01..2024-12-31) and 2025-2026
; (2025-11-28..2026-12-31) joined it. L3/L4 below fired only in the
; 2023-2024 window -- neither recurs in the other two, a fact worth
; keeping visible rather than merging away (see [expected_rows] on each).
; L5/L6 (Phase 2, 2026-08-22) extended the comparison to a second axis,
; Gloria (RG431-432) -- both fire in more than one window, at DIFFERENT
; counts per window, so both are prose-only (L2's own precedent), not
; machine-checked [id] records; see each for the real enforcement site.
; L5 was MISADJUDICATED as "colitur's own gap" and CORRECTED
; (l5-f3-readjudication task, 2026-08-22): see L5's own entry for the
; full account -- it is an OCCURRENCE difference (the LMS Ordo follows
; the 2020 decree Cum Sanctissima, colitur excludes it by binding
; design), not a Gloria defect.
;
; A SEPARATE file from data/ef/expected-divergences.sexp (the lectio
; allow-list) and data/ef/expected-divergences-missalemeum.sexp (the
; missalemeum/Divinum-Officium-lineage allow-list): this Ordo is a THIRD,
; independent lineage (a printed England & Wales diocesan book, ISBN
; 9781739209636, compiled directly from the 1962 Missal/1960 rubrics --
; never passed through Divinum Officium, missalemeum or lectio), so its
; own divergences are kept apart rather than tangled into either existing
; file's own provenance.
;
; [verdict] names which side this task's own primary-source research
; backs, the SAME convention the missalemeum file's own header states:
; not always "colitur".
;
; L1 -- CLOSED, FIXED (whole-branch review finding 1, 2026-08-22): was
; 2025-11-03 (All Souls' Day, transferred from 2 November, a Sunday that
; year). colitur used to say the Creed IS said (true) on rank alone
; (475(b), Class1) where the Ordo, correctly, says it is not: "Mon 3 ALL
; SOULS' DAY I Cl B / No Gl Sequence No Cr Pr of the Dead No Blessing".
;
; This entry's own PREVIOUS text argued the divergence could not be fixed
; without a signature change, because [creed]'s inputs (temporal/observed/
; date) have no notion of "this Mass is a Requiem". That argument was
; wrong: {!Colour.Black} is used by exactly TWO celebrations in the whole
; engine (verified by grepping every [colour Black]/[Colour.Black] site in
; lib/ and data/) -- [commemoration-of-all-souls] (data/ef/sanctoral.sexp)
; and Good Friday (temporal_ef.ml, already [false] via the RG 23(b) feria
; exclusion regardless of colour, and has no Mass at all in the
; 1955-restored Holy Week) -- so on every day this engine can construct,
; [colour = Black] if and only if the Mass is a Requiem: a citable
; implication (RG 117 assigns black to Masses of the dead) on THIS DATA,
; not a heuristic guess. [Rite_ef.Rubrics_ef.creed] now reads
; [observed.colour] as RG 476(f)'s own guard, positioned ahead of 475(b)'s
; rank branch; see rubrics_ef.ml's own header and the guard's own comment
; for the full account, and test_rubrics_ef.ml's
; [test_colour_black_population_is_exactly_two] for the test that fails
; loudly the day a third [Colour.Black] celebration is ever added, so this
; proxy cannot silently rot.
;
; BLAST RADIUS, measured (full 1583-9999 sweep of {!Colitur_kernel.
; Calendar.year}, grouped by [observed]'s own slug): 8 416 days changed
; from [true] to [false], every one [commemoration-of-all-souls] (missing
; from exactly 1 of the 8 417 domain years -- a boundary-year transfer
; effect at 1583/9999, not a third population member: see the "know what
; each layer cannot see"-style caveats elsewhere in this project for other
; instances of the same edge). A further 8 416 [Colour.Black] days are
; Good Friday ([ef-passiontide-2-friday]), unchanged by this fix (already
; [false] before it, via the earlier feria exclusion) -- confirmed
; [creed_true_among_black = 0] after the fix, over the WHOLE domain, not
; merely the fixture's own 2024-2025 window.
;
; `colitur day`/`colitur readings` are unaffected (neither prints [creed]);
; `colitur rubrics` output changes on exactly the 8 416 days above.

; L2 -- OPEN, colitur's own gap, found while building L1's fix (whole-
; branch review finding 2, 2026-08-22). NOT an active entry in this
; file's own machine-checked sense (no code loads or cross-checks an
; "L2" id anywhere -- this file's own [allow_entry] machinery is scoped
; to the CREED axis, {!test_lms_ordo.test_creed_matches_or_is_explained}
; alone; a second, unrelated axis reusing the same id-lookup mechanism
; would let one test's "declared but never fired" check spuriously trip
; on the other axis's own entry). Recorded here as prose only, the same
; discipline this file's own closed L1 note above and
; expected-divergences.sexp's own closed C-entries already use for a
; citation worth preserving without a live parser hook -- the REAL
; enforcement is test_lms_ordo.ml's own [test_formulary_override_matches],
; which asserts this population is exactly 3 days directly.
;
; Strengthening test_lms_ordo.ml's formulary-override check from PRESENCE
; to the actual STRING (this same finding 2) surfaced a real, separate
; defect in step 3 of the reading chain ({!Rite_ef.Lectionary_ef.
; readings}), independent of the Creed axis above. Three real days in the
; fixture window -- 2025-05-30 (Friday), 2025-06-02 (Monday), 2025-06-03
; (Tuesday), all between Ascension Thursday and the following Sunday --
; have no proper of their own and fall to {!Colitur_kernel.
; Mass_formulary.Preceding_sunday}. colitur resumes the nearest CALENDAR
; Sunday (the "5th"/"6th Sunday after Easter", Paschaltide's own week
; 6/7), but the Missal, and the Ordo, keep saying ASCENSION'S OWN Mass
; through this stretch instead: "Mass of the Ascension" on all three
; days, never a numbered-Sunday title. Step 3 has no notion of "inside
; Ascension's own after-feast period" -- it always resumes the nearest
; preceding Sunday, numbered or not.
;
; STRUCTURAL, not a fixture artefact: the Ascension is a fixed Easter+39
; (a Thursday inside Paschaltide week 6), so every feria whose own
; Preceding_sunday fallback would otherwise resolve to week 6 or 7 falls
; in this same stretch, every year -- this is not a coincidence of
; 2024-2025 alone, though only this fixture's own window has been checked
; against a real Ordo.
;
; NOT FIXED in this task: fixing it means teaching step 3, or the
; lectionary data, about Ascension's own after-feast period -- the same
; shape as the Christmastide "infra octavam Nativitatis" entries
; data/ef/lectionary.sexp already carries directly rather than resolving
; through this fallback -- a lectionary-data change out of a fix round's
; own scope. test/test_lms_ordo.ml's own [is_after_ascension] excludes
; this population from the general mapping (bounded ABOVE by Pentecost,
; not merely "later than Ascension" -- see its own citation, corrected
; during the Witnesses task after a first version manufactured 8 false
; failures by matching any later date in the same civil year), and
; [test_formulary_override_matches] asserts its exact size per window.
;
; CORRECTED (Witnesses task, 2026-08-22): this note previously said "exactly
; 3 real days" as though that were a universal count. Extending the
; comparison to 2023-2024 and 2025-2026 showed it is not -- the population
; depends on which OTHER days that particular year's Ascension-adjacent
; week happen to have their own competing propers (a saint, a vigil), so
; it varies year to year: 3 in 2024-2025, 1 in 2023-2024 (only 30 May 2024
; -- Rogation Monday, 6 May 2024, is BEFORE Ascension and correctly resumes
; the ordinary "5th Sunday after Easter" instead, once the exclusion's own
; date comparison was corrected to test "after Ascension AND before
; Pentecost" rather than "week 6 or 7"), 2 in 2025-2026. All three counts
; measured directly, all showing "Mass of the Ascension", none unexplained.
;
; Domain-wide count: unmeasured -- "which feria is inside Ascension's own
; after-feast period" is not a distinct predicate anywhere in this
; codebase to sweep on. Structurally recurs every year, though the exact
; per-year count is now known to vary (1-3 in the three years measured),
; not a flat "3 days/year".

; L3 -- CLOSED, FIXED (bissextile-shift task, 2026-08-22; NOT an active
; sexp record any more, same convention L1 above established -- removed
; from [test_allow_list_ids_are_exactly_l3_l4]'s own expected set, which
; now names L4 alone). Was OPEN, colitur's OWN genuine gap, found
; extending this suite to the 2023-2024 window (Witnesses task,
; 2026-08-22), firing once: 2024-02-24.
;
; Citation, preserved verbatim: the Missale Romanum's own CALENDARIUM
; table, February, footnote (docs/research/LT.txt:5011-5013, scan-
; corroborated docs/research/scan2.txt:3050-3058, OCR-damaged to
; "bi&sextili"/"Matthue"/"Cabrielis" but unmistakable against the
; undamaged transcription): "In anno bissextili mensis februarius est
; dierum 29, et festum S. Matthiae celebratur die 25 februarii, ac festum
; S. Gabrielis a Virgine perdolente 28 februarii, et bis dicitur sexto
; calendas, id est die 24 et die 25" -- in a leap year February has 29
; days, St Matthias is kept on 25 February (not 24), St Gabriel of Our
; Lady of Sorrows on 28 February (not 27), and the sixth kalends of March
; is said twice. Not RG-numbered -- a calendarium footnote, not a
; Rubricae Generales paragraph.
;
; FIXED: {!Rite_ef.Temporal_ef.bissextile_fixed_key}, threaded through
; {!Colitur_kernel.Rite.t}'s new [fixed_key] field (read only by
; {!Colitur_kernel.Layer.on_date}'s FIXED half, so the kernel stays
; rite-agnostic -- a rite that supplies nothing behaves exactly as
; before). Implemented as the rubric's own MECHANISM (every fixed entry
; from 24 through 28 February shifts one civil day later in a leap year,
; 24 February itself carrying no fixed entry that year), not as "move
; these two named saints": the two are indistinguishable on shipped data
; (nothing else is fixed in that window) and diverge only for a future
; [--overlay] entry in the same range, which the mechanism reading covers
; and a two-saints special case would not.
;
; 2024-02-24/25 now MATCH the Ordo: colitur's Creed follows the same
; Matthias-vacates-24/loses-outright-on-the-Sunday-25th path the note
; below already inferred from the Ordo's own titles, and the LMS
; 2023-2024 suite's Creed and formulary-override checks are both green
; (the formulary bucket's own [expected_proper] constant dropped 182->181
; for this window: 24 February is now the Ember Saturday's own Own_slug-
; sourced proper, not Matthias's Proper-sourced one, leaving the counted
; population rather than changing which slug's proper it is).
;
; BLAST RADIUS, MEASURED (full 1583-9999 sweep, {!Colitur_kernel.Calendar.
; year} run twice per civil year -- once with the real [fixed_key], once
; with it forced to the identity default -- every changed liturgical day
; diffed on observed slug/rank/colour/subject/commemorations; throwaway
; probe, tools/probe_bissextile.ml, run for this task and not committed,
; same precedent as tools/probe_matthias.ml above):
;
;   - ALL 2 041 leap years in the domain show at least one visible
;     Matthias-related change, and separately all 2 041 show at least one
;     Gabriel-related change -- every leap year in 1583-9999 is touched.
;   - 6 983 individual liturgical days change domain-wide, ZERO
;     unclassified: exactly four shapes, all the same mechanism --
;     Matthias vacates 24 February (1 803 years) and newly appears on 25
;     February (1 811 years); Gabriel vacates 27 February (1 699 years)
;     and newly appears on 28 February (1 670 years). "Vacates"/"appears"
;     covers BOTH observed-outright and commemorated-only presence, not
;     observed alone -- RG 111's admission cap can relegate the shifted
;     saint to a bare commemoration rather than the day's own office, and
;     a classifier that only watched [observed] undercounted by roughly a
;     tenth on a first pass (found and corrected before this note was
;     written: the OBSERVED-outright figures alone, tracked separately
;     for direct comparison against this entry's own prior estimate
;     below, are 1 677 for Matthias and 571 for Gabriel).
;   - THIS ENTRY'S OWN PRIOR ESTIMATE, checked: "of 2 041 leap years,
;     colitur observes matthias on 24 February in 1 650 of them" is
;     confirmed close but not exact against the real, precisely-measured
;     figure on the SAME (observed-outright-only) definition -- 1 677, a
;     2% difference consistent with the prior probe's own "roughly
;     measured" caveat, not a sign either probe was wrong in kind. The
;     prior estimate's own further caveat -- "some of those years may see
;     identical final output either way" -- is also confirmed real but
;     small: 1 677 (narrow, observed-only) vs 1 803 (broad, observed-or-
;     commemorated) for the SAME 24-February-vacated population shows the
;     narrow definition undercounts genuine visible impact rather than
;     overcounting it, because a saint who only lost outright pre-fix
;     (never observed, never commemorated, invisible either way) is
;     absent from BOTH counts and was never the source of the gap between
;     them.
;   - Gabriel's own sibling shift, unwitnessed by this fixture's own
;     2023-2024 window (no divergence fired on either 27 or 28 February
;     2024 -- 2024's own competing office there does not expose it), is
;     the identical mechanism and closes with the same fix; its own
;     measured figures are recorded above for the first time, this entry
;     having previously had no estimate for it at all.
;
; The differential (lectio, layer 3) gained a new cited entry for its own
; 2005-2050 window, data/ef/expected-divergences.sexp's C40 -- lectio
; implements no such shift either (confirmed directly against the
; fixture: Matthias/Gabriel sit at their PRE-shift dates in every one of
; the 11 leap years that window covers), so every leap year in it now
; diverges on the two shifted days, 21 rows total. See C40's own note for
; the row-by-row account.

; L4 -- OPEN, adjudicated FOR colitur (a defensible primary-source reading,
; not a fix confirmed against the Ordo -- the Ordo's own contrary reading is
; also textually arguable, see below). Fired once: 2023-12-24.
((id L4)
 (citation "RG 30(a) (Caput V, De Vigiliis, docs/research/LT.txt:959-961): \"vigilia Nativitatis Domini quae, IN OCCURRENTIA, locum tenet dominicae IV Adventus, de qua, proinde, NULLA FIT COMMEMORATIO\" -- the Vigil of the Nativity, when it occurs [on a Sunday], TAKES THE PLACE of the 4th Sunday of Advent, of which, accordingly, no commemoration is made -- the identical \"locum tenet ... nulla fit commemoratio\" shape RG16(a) uses for a Feast of the Lord occurring on a II-class Sunday, which colitur already implements and which RG475(a) explicitly extends the Creed to (\"in qualibet dominica, etsi eius Officium alicui festo locum cedat\").")
 (verdict open)
 (note "2023-12-24 (the 4th Sunday of Advent AND Christmas Eve, a genuinely rare coincidence -- roughly 1 year in 7 -- absent from both the 2024-2025 and 2025-2026 windows, where Christmas Eve falls on a Tuesday and a Wednesday respectively). colitur says the Creed IS said (true), reading [temporal]'s own weekday (Sunday) per RG475(a)'s clause, positioned ahead of the vigil-exclusion check in {!Rite_ef.Rubrics_ef.creed} -- unconditionally, the same way it already does for RG16(a)'s Feast-of-the-Lord case. The Ordo says \"No Gl No Cr\" for this date. ADJUDICATED FOR COLITUR, not merely left open by default: RG30(a)'s own \"locum tenet ... nulla fit commemoratio\" language is textually closer to RG16(a) (which colitur already treats as Creed-preserving) than to an ordinary vigil superseding a Sunday -- the Vigil does not merely WIN THE DAY, it takes the SUNDAY'S OWN IDENTITY, the same shape RG475(a) was written to reach. The COUNTER-reading is real and not dismissed here: RG475(a)'s own text says \"locum cedat ... festo\" (gives way to a FEAST), and RG35 (Caput VI) classifies feria/vigilia/festum as three distinct liturgical-day categories -- a strict textual reading could confine 475(a)'s override to FEAST-displacement only, leaving a VIGIL-displaced Sunday to fall through to the general vigil exclusion (476, via RG33's own \"a vigil is a distinct category\" reasoning already coded elsewhere in {!Rite_ef.Rubrics_ef.creed}). Left OPEN rather than closed on this task's own authority: adjudicating scripture-grade primary-source questions is out of scope for a witness-wiring task, and the two readings are both defensible. Not fixable inside this task's own no-lib-changes constraint regardless of which reading eventually wins.")
 (expected_rows 1))

; L5 -- MISADJUDICATED, NOW CORRECTED (l5-f3-readjudication task,
; 2026-08-22). This entry previously read "OPEN, colitur's own gap" --
; WRONG, on two independent grounds (below). It is NOT a Gloria defect
; of colitur's. It is NOT a rubric dispute at all: it is an OCCURRENCE
; difference, because the LMS Ordo is compiled to the 2020 decree Cum
; Sanctissima (its own introduction says so, docs/research/ordo/
; PROVENANCE-lms.md) and colitur excludes that decree from its 1962 core
; by BINDING DESIGN (CLAUDE.md decision 2: "Every addition [2020 Quo
; Magis/Cum Sanctissima, any community's proper] is an overlay, never
; core"). On these 16 dates colitur and the LMS Ordo each correctly
; describe a DIFFERENT, both genuine, calendar -- they were never
; disagreeing about the same one. VERDICT: colitur correct. NOT an
; active machine-checked [id] entry -- same reasoning L2 above gives:
; the count varies window to window (5 in 2023-2024, 5 in 2024-2025, 6
; in 2025-2026), so a single static [expected_rows] cannot check it. The
; REAL enforcement is test_lms_ordo.ml's own [is_l5_lenten_commemoration]
; predicate plus [make_suite]'s own ~expected_gloria_l5 parameter,
; asserted per window directly -- KEPT, unlike a bug-driven divergence
; that stops firing once fixed (data/ef/expected-divergences-fiuv.sexp's
; own F3, closed by this same task, is that other shape): this one is
; EXPECTED TO RECUR IN EVERY FUTURE WINDOW, because the exclusion it
; reflects is a standing design decision, not a defect to remove.
;
; THE ORIGINAL, SUPERSEDED HYPOTHESIS -- preserved below verbatim, the
; same "retain the wrong reading and say why it was wrong" convention
; L3's and F1's own history in this file already establish, NOT deleted:
;
; SHAPE, identical in all 16 instances found (5+5+6, zero exceptions):
; a privileged Lenten or Passiontide feria (Class3, violet -- RG25,
; {!Rite_ef.Temporal_ef.ferial_rank}) whose own office is impeded and
; carries EXACTLY ONE commemoration, of a Class3 saint colitur's own
; precedence engine (independently validated, layers 3-5) correctly
; reduces to a mere commemoration. colitur's [gloria] reads [false] (the
; day is a plain ferial office by every test [Rite_ef.Rubrics_ef.te_deum]
; runs -- no Sunday, no vigil, no octave, [named] = [None], [subject] =
; [Temporal]); the Ordo reads [true] in every one of the 16 instances.
; (This description of the SHAPE is still accurate -- what was wrong is
; the CONCLUSION drawn from it, below.)
;
; CITATION (docs/research/LT.txt:2359-2361, "V - De Missis festivis",
; quoted in rubrics_ef.ml's own [gloria] header in full): "302. Sensu
; autem latiore, dicuntur quoque Missae de festo: ... b) Missa de
; commemoratione in Officio diei occurrente" -- in the WIDER sense, a Mass
; "of a commemoration occurring in the day's own Office" is ALSO called a
; "Missa festiva" -- and RG431(b): "Hymnus Gloria in excelsis dicitur ...
; in Missis festivis de quibus n. 302" -- such a Mass says the Gloria.
; Textually, this appears to be EXACTLY the shape found: the day's own
; ferial Office, carrying a commemoration, is elevated to "festive" status
; for the Gloria specifically.
;
; WHY NOT FIXED HERE (the original text, which already quoted the very
; clause that defeats its own hypothesis, below, but did not follow it
; to its conclusion): n.303(b), the very next paragraph (LT.txt:2359-2367,
; same quote in rubrics_ef.ml), qualifies n.302(b)'s own Masses: "dici
; potest tantum si occurrit dies liturgicus IV classis" -- CAN ONLY BE
; SAID if the liturgical day occurring is IV class. Every instance found
; here is a Class3 PRIVILEGED FERIA (RG25), not IV class, which reads as a
; textual CONTRADICTION of the empirical finding rather than a
; confirmation of it -- unresolved without n.304 onward (not in this
; project's sources), which may clarify that 301-303 govern which Mass a
; priest may freely CHOOSE among several options in one church on one day
; (a dimension colitur does not model -- see [gloria]'s own SCOPE NOTE),
; a different question from "does THE Mass actually said, once
; determined, say the Gloria" (431(b)'s own question). Implementing this
; also has a real architectural cost this task's own instructions
; explicitly avoided: [Rite_ef.Rubrics_ef.gloria] would need a FOURTH
; parameter, the day's own {!Colitur_kernel.Liturgical_day.t.commemorations}
; -- a kernel [Rite.t.gloria] signature change, the same shape RG16(a)'s
; own [admit] fix needed a [~temporal] parameter for, and squarely out of
; a task briefed to "follow exactly how creed was wired -- same seam".
; Left OPEN, not guessed into a possibly-wrong rule. Recommended for a
; follow-on task, ideally alongside Phase 3's Preface work (RG483 governs
; a DIFFERENT, but textually adjacent, commemoration-vs-Mass-part
; question, so the two may share the same kernel signature widening).
;
; UPDATE (same original task, after wiring the FIUV Ordo's own Gloria and
; Te Deum axes, test_fiuv_ordo.ml): this paragraph previously said FIUV's
; own [gloria] axis was not compared at all. It now is, and the result
; WEAKENS this entry's own case rather than strengthening it: FIUV's own
; [gloria] is [false] on all six of these exact dates in its window --
; AGREEING WITH COLITUR, DIRECTLY CONTRADICTING the LMS Ordo's [true]
; above. So this is not "colitur has a corroborated gap", it is "two
; independent Ordos disagree with EACH OTHER on Gloria for this shape,
; and colitur happens to agree with the universal one, not the diocesan
; one". What FIUV's OWN Te Deum axis DOES show for the identical six
; dates: [true] -- Te Deum, unlike Gloria, genuinely IS said at Matins on
; these days (data/ef/expected-divergences-fiuv.sexp's own F3), a real,
; single-witness finding that this entry's own n.302(b)/431(b) citation
; may in fact belong to the DIVINE OFFICE, not the MASS -- which would
; mean L5 itself is answering the wrong question, not merely open.
; Genuinely uncertain which of the two Mass-Gloria witnesses (LMS or
; FIUV) is right for this shape; left OPEN, not adjudicated either way,
; for a follow-on task with more primary-source access than this one had.
; (CORRECTED, l5-f3-readjudication task: F3's own "single-witness
; finding" was never a Te Deum finding at all -- it was
; tools/extract_fiuv_ordo.ml reading the WRONG PRINTED OFFICE, see below.
; There was no Office-vs-Mass question to be uncertain about.)
;
; THE CORRECTION, in full (l5-f3-readjudication task, 2026-08-22):
;
; 1. RG303(b) ALREADY DEFEATS the n.302(b)/431(b) hypothesis on its own
;    terms -- the original text above quoted it but stopped short of the
;    conclusion. Quoted again, in full, because it is the load-bearing
;    sentence: "dici potest tantum si occurrit dies liturgicus IV
;    classis" -- [a Mass "of a commemoration occurring in the day's own
;    Office"] MAY BE SAID ONLY IF the liturgical day occurring is FOURTH
;    class. A privileged Lenten or Passiontide feria is THIRD class
;    (RG25) -- every one of these 16 instances. So n.302(b) is
;    PROHIBITED, not merely inapplicable, on precisely the days this
;    entry covers, and 431(b)'s own Gloria elevation, which depends on
;    302(b), can never reach them. Not "unresolved without n.304" as the
;    original text guessed: 303(b) alone already closes the question,
;    the wrong way for the original hypothesis.
;
; 2. THE FIUV ORDO PRINTS BOTH OPTIONS, and this is decisive on its own,
;    independent of (1). All 16 LMS dates are Lenten/Passiontide
;    privileged ferias; six of them fall inside the FIUV fixture's own
;    2025-2026 window (2026-03-06/07/09/12/21/24 -- the same six F3
;    named). For every one of the six, the raw FIUV source (verified
;    directly against a fresh pdftotext -layout dump, not merely the
;    fixture) prints TWO complete readings for the SAME civil date,
;    separated by a literal "-VEL-" ("or") token. 24 March 2026, in
;    full:
;
;      24. Viol  Feria III post Dom. I Passionis, De ea, III cl. - Off. feriale temp. Passionis.
;                Ad LAUDES ... comm. S Gabrielis Archangeli.
;                Missa pr., (omittuntur ps. Iudica me et Gloria Patri), sine Gloria, comm. S
;                Gabrielis Archangeli, sine Credo, praef. de Sancta Cruce or. super populum.
;                I VESPERAE de seq., comm. huius diei. - Compl. de dom.
;                -VEL-
;                Feria III. S Gabrielis Archangeli, III cl. (Priv.) - Off. ordinarium. - Ad Mat.
;                Ll. 1a et 2a (= 2a + 3a) de Scr. occ., 3a de festo, Te Deum. - Ad LAUDES comm.
;                Feriae.
;                Missa pr., Gloria, comm. Feriae, tractus, sine Credo, praef. de Sancta Cruce vel
;                de Angelis.
;
;    The FIRST option is strict 1962: the feria wins, "sine Gloria", no
;    Te Deum stated, the saint merely commemorated -- EXACTLY colitur's
;    own answer, field for field. The SECOND, after "-VEL-", is the
;    Cum-Sanctissima-elevated option: the saint's own feast, "Off.
;    ordinarium", Gloria, Te Deum, the feria commemorated instead --
;    EXACTLY the LMS Ordo's own answer. The FIUV Ordo's own title page
;    states the convention this book uses throughout for exactly this
;    distinction (N.B., page 1, verified directly against the PDF):
;    "days of the third class to which the norms of the decree Cum
;    santissima [sic] apply are marked 'III cl.' ... but days ... to
;    which these norms do not apply are marked 'III cl. (Priv.)'." One
;    document, compiled by a THIRD party independent of both colitur's
;    own lineage and the LMS, prints BOTH engines' own answers side by
;    side as two legitimate readings of two different calendars. There
;    is no dispute left to adjudicate.
;
; So the Gloria and Te Deum RULES were never in dispute at all: each
; engine's answer follows correctly from its own occurrence result, on
; its own calendar. What this entry originally described as "colitur's
; own gap" is colitur correctly implementing the 1962 core it was built
; to implement, diverging from a printed book that, by its own
; introduction, deliberately implements something else.
;
; NOTE ALSO (so a reader arriving here from
; data/ef/expected-divergences-fiuv.sexp's own F3 does not draw the
; wrong conclusion from that entry's own closure): F3 did NOT
; "corroborate" or "contradict" L5 at any point in this history. Both
; were the same underlying fact read two different ways, and F3's own
; apparent Te Deum-true reading was never a real second data point in
; the first place -- it was tools/extract_fiuv_ordo.ml's own
; [extract_te_deum] silently reading the SECOND ("-VEL-") office's own
; Te Deum instead of the primary's, on exactly these six dates, closed
; by fixing the extractor (tools/extract_fiuv_ordo.ml's own
; [split_at_alt_office]), not by resolving any Office-vs-Mass question.
; See F3's own entry for the full account.

; L6 -- OPEN, root-caused to a DIFFERENT, PRE-EXISTING bug this Gloria
; comparison merely surfaced, not a Gloria defect itself. Fired once,
; 2023-2024 only (2024-05-06, Rogation Monday) -- absent from the other
; two windows because Rogation Monday/Tuesday is impeded by a real
; sanctoral feast in both of them, so the office's own colour never
; reaches [observed] there. Same non-machine-checked-count reasoning as L5
; above (count 1/0/0); enforced by test_lms_ordo.ml's own
; [is_l6_rogation_colour] predicate and [make_suite]'s own
; ~expected_gloria_l6 parameter.
;
; {!Rite_ef.Temporal_ef.temporal}'s own Rogation Monday/Tuesday branch
; hardcodes [~colour:Colour.Violet] with NO RG citation at all (verified
; by reading the branch directly, temporal_ef.ml, the Rogation comment
; block). The Ordo shows 2024-05-06 as \"FERIA IV Cl W †\" (white),
; borrowing \"Mass of 5th Sunday after Easter\" (matching colitur's own
; [Mass_formulary.Preceding_sunday] resolution for the identical date) --
; consistent with RG88 (Caput X, \"De Litaniis maioribus et minoribus\"):
; \"De Litaniis minoribus nihil fit in Officio, sed tantum in Missa\" --
; nothing changes in the OFFICE for the Minor Litanies, only the Mass
; TEXT is proper, which reads as the Office's own colour (Paschaltide,
; white) staying unchanged, the violet belonging only to the PROCESSION
; that precedes the Mass -- the same PER-ACTION colour nuance this
; project already documents as unmodelled for Palm Sunday's palm
; procession and Good Friday's Communion rite (temporal_ef.ml's own RG126/
; RG128 citations), not a new kind of gap.
;
; NOT FIXED HERE: out of this task's own scope (Gloria/Te Deum, not the
; temporal cycle's colour assignment), and a real fix needs its own
; measured blast radius across 1583-9999 (every Rogation Monday/Tuesday
; not impeded by a stronger feast) plus a re-check against the
; differential/oracle layers, which already treat Rogation days as
; correctly violet on whatever data they compare against -- a
; cross-layer question, not a one-line patch. Recommended as a follow-on
; task's own first item.")