# OmniFP-Bench v4.1 — datasheet

Every number below is counted from the released files.

## Protocol

| | date | meaning |
|---|---|---|
| a | 2026-06-09 | start of the known zone |
| b | 2026-07-21 | cutoff: systems read [a, b] only |
| c | 2026-08-11 | end of the unknown zone: answers settle in (b, c] |

## Items

1530 items over 1013 events.

| domain | items | storylines |
|---|---|---|
| Politics & Government | 250 | 129 |
| Geopolitics & Conflict | 245 | 92 |
| Law & Crime | 132 | 71 |
| Environment & Disasters | 169 | 62 |
| Business & Finance | 248 | 134 |
| Technology | 107 | 52 |
| Health & Medicine | 131 | 66 |
| Sports | 248 | 108 |

| required modality | n |
|---|---|
| T | 1215 |
| I | 187 |
| D | 64 |
| A | 37 |
| V | 27 |

| answer type | n |
|---|---|
| numeric_value | 586 |
| mcq | 314 |
| named_entity | 253 |
| binary | 211 |
| perturbed_binary | 119 |
| date | 44 |
| numeric_threshold | 3 |

| horizon | n |
|---|---|
| H14 | 630 |
| H7 | 563 |
| H21 | 337 |

Negative twins: 117. Cross-domain chain items: 951. Flagged parametric_solvable (labelled, not removed): 281.

## Resource pool (known / unknown)

| domain | T | I | D | V | A | all |
|---|---|---|---|---|---|---|
| Politics & Government | 445 / 562 | 60 / 29 | 40 / 35 | 30 / 25 | 20 / 18 | 595 / 669 |
| Geopolitics & Conflict | 408 / 491 | 70 / 19 | 30 / 30 | 25 / 25 | 15 / 15 | 548 / 580 |
| Law & Crime | 215 / 231 | 45 / 12 | 55 / 45 | 17 / 20 | 15 / 15 | 347 / 323 |
| Environment & Disasters | 193 / 293 | 70 / 7 | 35 / 35 | 4 / 6 | 15 / 15 | 317 / 356 |
| Business & Finance | 476 / 554 | 45 / 44 | 60 / 45 | 17 / 17 | 20 / 20 | 618 / 680 |
| Technology | 160 / 215 | 60 / 17 | 35 / 35 | 7 / 10 | 15 / 15 | 277 / 292 |
| Health & Medicine | 147 / 221 | 40 / 10 | 55 / 45 | 6 / 10 | 15 / 15 | 263 / 301 |
| Sports | 427 / 582 | 80 / 54 | 35 / 35 | 4 / 4 | 20 / 15 | 566 / 690 |
| **all** | 2471 / 3149 | 470 / 192 | 345 / 305 | 110 / 117 | 135 / 128 | 3531 / 3891 |

Roles: {"precursor": 2555, "settling": 3530, "distractor": 976, "context": 361}.

This release ships the known pool only (`pool/known.jsonl`). The unknown-zone counts above, and the roles (counted over both pools), describe the construction pool, which is not included. Recordings (A) and documents (D) ship as their transcript / text; their original audio and document files are not included.

## Construction funnel (v4.0 build log)

| stage | in | out | leading rejection reasons |
|---|---|---|---|
| S1_event_mining_news | 6070 | 3709 | news_not_independent 56203, fewer_than_two_confirming_sources 899, event_in_known_zone 413 |
| S1_event_mining_anchor | 5265 | 727 | fewer_than_two_confirming_sources 3096, document_does_not_state_event 694, evidence_quote_not_in_sources 430 |
| S1_event_mining | 7655 | 6855 | near_duplicate_statement_same_day 697, same_event_as_anchored_card 65, duplicate_event_id 38 |
| S1_event_mining_news2 | 8538 | 3219 | news_not_independent 48611, covered_by_earlier_pass 5124, fewer_than_two_confirming_sources 2688 |
| S2_precursor_leak | 6855 | 2240 | precursor_level_1 3900, outcome_stated_in_known_zone 507, fewer_than_two_precursor_resources 142 |
| S3_question_synthesis | 2240 | 2101 | question_names_nothing_from_event 563, yes_no_answer_for_non_binary_type 455, question_contains_sibling_answer 345 |
| S3m_media_questions | 25 | 228 | vid:answer_not_gradable 11, vid:detail_not_legible 5, vid:answer_present_in_text 5 |
| S4_multirole_judge | 153 | 126 | verify_failed:faithful 17, attack_fatal:wrong_gold 9, verify_failed:verifiable 1 |
| S3d_document_audio_questions | 398 | 153 | answer_present_in_articles 105, quote_not_in_record 90, one_item_per_event_and_modality 29 |
| S5_deterministic_audit | 4047 | 2988 | A2b_quote_does_not_carry_answer 624, A2_quote_not_in_cited_resource 421, A7_gold_present_in_known_zone 263 |
| S5c_releak_known_zone | 2988 | 2589 | outcome_stated_in_known_zone 297, twin_of_leaked_item 102 |


## v4.1 (2026-09-19)

Three construction defects of v4.0 fixed: multiple-choice options shuffled (v4.0 had gold = option A on all 314); the 180 numeric_threshold items with a numeric gold retyped numeric_value; negative-twin deadlines moved onto the parents' horizon grid (b+7/14/21), twins with no grid point before their event dropped. Fix counts: {"mcq_shuffle": 314, "threshold_retyped_numeric_value": 180, "twin_deadline_to_grid": 113, "twin_dropped_no_grid_point": 43, "twin_already_on_grid": 4, "twin_dropped_event_recurs_in_window": 7}. Items: 1530.