id int64 31 1.44k | fact_text stringlengths 47 292 | category stringclasses 8
values | era stringlengths 4 74 | region stringlengths 4 71 ⌀ | verification_tier stringclasses 2
values | independence_score float64 0.58 1 | cluster_count int64 2 11 | surprise_score int64 1 9 | confidence_level stringclasses 2
values |
|---|---|---|---|---|---|---|---|---|---|
384 | Analytic philosophy is characterized by the 'linguistic turn', a concern with language and meaning. | culture | 20th century | global | silver | 0.917 | 3 | 3 | high |
47 | The Pirahã people of the Amazon have no words for specific numbers, colors, or perfect tenses, and their language contains no recursion—challenging Chomsky's theory of universal grammar. | culture | modern | South America | gold | 0.882 | 11 | 9 | high |
695 | In folklore, black-eyed children are alleged to be undead, ghostly, demonic, alien, or otherwise inhuman creatures impersonating ordinary human children. | culture | modern | global | silver | 0.875 | 2 | 6 | high |
692 | Black-eyed children are described as having pale skin and pitch-black eyes. | culture | contemporary | global | silver | 0.875 | 2 | 4 | high |
446 | Tabloid newspapers published speculation that the Baltic Sea anomaly object was a sunken UFO. | culture | 2010s | Baltic Sea / Sweden | silver | 0.833 | 3 | 4 | high |
382 | Analytic philosophy emphasizes analysis, clear prose, rigorous arguments, formal logic, mathematics, and the natural sciences. | culture | 20th century | global | silver | 0.833 | 3 | 2 | high |
645 | 50 Things That Made the Modern Economy is presented by economist and journalist Tim Harford. | culture | contemporary | global | silver | 0.833 | 3 | 1 | high |
144 | Andean dark constellations are called 'yana phuyu' in Quechua, which literally translates to 'black cloud'. | culture | traditional/ongoing | South America | silver | 0.812 | 4 | 7 | high |
444 | Tabloid newspapers published speculation that the Baltic Sea anomaly was a sunken UFO. | culture | 2010s | Europe | silver | 0.812 | 4 | 4 | high |
691 | Black-eyed children are described as superficially resembling human children or teenagers between the ages of 6 to 16. | culture | modern (20th-21st century) | global (originated in United States) | silver | 0.812 | 4 | 4 | high |
699 | Trevor Henderson is best known for creating the creature Siren Head. | culture | 2010s-present | global | silver | 0.812 | 4 | 3 | high |
50 | Japan's Hadaka Matsuri (Naked Festival) involves thousands of nearly-naked men competing to touch a sacred wooden stick, with origins dating back 500 years as a purification ritual. | culture | modern | Asia | silver | 0.575 | 7 | 7 | high |
1,371 | The rotavirus vaccine was withdrawn by its manufacturer, Wyeth Ayerst Laboratories, after only one year on the market. | history | 1990s | United States | gold | 1 | 3 | 6 | high |
374 | In the 'rhetorical' stage of mathematical notation history, calculations were described purely by words rather than symbols. | history | ancient to medieval period | global (Greek, Middle Eastern, and other early mathematical traditions) | gold | 1 | 3 | 5 | high |
1,129 | Abu Hureyra consisted of two settlements: a Paleolithic hunter-gatherer village beneath a later farming town. | history | prehistoric (Epipalaeolithic to Pre-Pottery Neolithic, c. 13,000–6000 BCE) | Syria (Euphrates Valley, Near East) | silver | 1 | 2 | 6 | high |
1,196 | Mass human migrations into the Americas occurred around 13,400 years ago, roughly 1,000 years before the onset of the Younger Dryas. | history | prehistoric (Pleistocene, ~13,400 years ago) | Americas | silver | 1 | 2 | 5 | high |
901 | Apollo astronauts had to perform some return maneuvers while their spacecraft was behind the moon and outside communications range with Earth. | history | 1960s-1970s | global | silver | 1 | 2 | 4 | high |
1,223 | Jebel Sahaba is considered the oldest cemetery discovered so far in the Nile Valley. | history | prehistoric (c. 13,000-14,000 years ago) | Nile Valley, Sudan | gold | 0.983 | 3 | 5 | high |
373 | In the syncopated stage of mathematical notation, quantities and common algebraic operations began to be represented by symbolic abbreviations. | history | ancient/classical (c. 250 CE onward) | Mediterranean/Greece; also India | gold | 0.983 | 3 | 4 | high |
569 | Japanese leaders were tried for war crimes after World War II. | history | 1945-1952 | Japan | gold | 0.983 | 3 | 2 | high |
1,001 | Apollo 11 landed 4.2 miles from its intended target, the farthest off-target landing of the Apollo lunar missions. | history | 20th century | global | gold | 0.963 | 4 | 6 | high |
745 | Fritz Vincken gave a later account describing the Christmas Eve truce of 1944. | history | 1944 | Germany/Belgium border (Hürtgen Forest area) | gold | 0.95 | 3 | 6 | high |
1,225 | New technology detected dozens of additional wounds on the Jebel Sahaba skeletons beyond the arrowhead impact marks previously identified. | history | prehistoric (Nile Valley, ~13,000 years ago) | Sudan/Egypt border (Jebel Sahaba) | silver | 0.95 | 3 | 6 | high |
1,224 | The Jebel Sahaba skeletons were excavated in the 1960s by American archaeologist Fred Wendorf. | history | 20th century (excavation); site dates to ~13,000 years ago | Nile Valley, Sudan | silver | 0.95 | 3 | 3 | high |
31 | Tardigrades can survive in the vacuum of space, withstand pressures six times greater than the deepest ocean trenches, and endure radiation doses 1,000 times what would kill a human. | nature | modern | global | silver | 1 | 7 | 9 | high |
1,038 | The deep Atlantic contains some of the world's oldest and most spectacular cold-water coral reefs and deep-sea sponge grounds, which depend on ocean currents to deliver food and disperse offspring. | nature | present | Atlantic Ocean | gold | 1 | 4 | 7 | high |
641 | Another hypothesis for fairy circle formation proposes that competition between grasses naturally yields certain vegetation patterns. | nature | contemporary | Namibia / Southern Africa | gold | 1 | 4 | 6 | high |
970 | The toxic algal bloom during the Pacific 'Blob' period delayed and partially closed recreational and commercial fishing seasons for sardines, anchovies, crabs, and razor clams. | nature | 2014-2016 | US West Coast (California to British Columbia) | gold | 1 | 4 | 6 | high |
637 | Fairy circles occur in the arid grasslands of the Namib desert in western parts of Southern Africa. | nature | contemporary | Southern Africa (Namib Desert, Namibia, Angola, South Africa) | gold | 1 | 4 | 5 | high |
954 | Warmer water associated with the Pacific Blob first appeared about 125 miles off the West Coast of the United States in early 2014. | nature | 2014 | North America - West Coast (Pacific Ocean) | gold | 1 | 4 | 4 | high |
964 | The toxic algal bloom during the Pacific Blob delayed and partially closed recreational and commercial fishing seasons for sardines, anchovies, crabs, and razor clams. | nature | 2015 | US West Coast (California, Oregon, Washington) | gold | 1 | 3 | 6 | high |
636 | Fairy circles are often encircled by a ring of stimulated grass growth. | nature | modern | Southern Africa (Namib Desert) | silver | 1 | 2 | 6 | high |
968 | The Pacific 'Blob' marine heatwave coincided with unexpected die-offs of California sea lions, Guadalupe fur seals, common murres, and Cassin's auklets. | nature | 2014-2016 | North Pacific / West Coast North America | gold | 0.988 | 4 | 6 | high |
1,056 | The Younger Dryas cold period began in less than 100 years and lasted roughly 1,300 years, occurring approximately 12,900 to 11,600 years ago. | nature | prehistoric (Pleistocene-Holocene boundary, ~12,900-11,600 years ago) | global (most pronounced in North Atlantic region) | gold | 0.983 | 3 | 7 | high |
640 | One hypothesis for fairy circle formation proposes that the activities of various types of termites affect vegetation growth. | nature | contemporary | Southern Africa | gold | 0.983 | 3 | 6 | high |
948 | The Pacific 'Blob' marine heatwave persisted from late 2013 through most of 2015 and into 2016. | nature | 2013-2016 | North Pacific Ocean | gold | 0.983 | 3 | 5 | high |
1,433 | In 2015, Brian Nosek's lab attempted to replicate 100 studies from three psychology journals and was unable to reproduce a large portion of the original findings. | psychology | 2010s | global | silver | 1 | 2 | 7 | high |
1,422 | Only 39 of the 100 psychology studies examined in the Reproducibility Project were successfully replicated. | psychology | 2010s | global | gold | 0.983 | 3 | 7 | high |
1,430 | In the Reproducibility Project, effects that were successfully replicated were generally smaller or weaker than the effects reported in the original studies. | psychology | 2010s | global | silver | 0.983 | 3 | 6 | high |
1,441 | Scott E. Maxwell, Michael Y. Lau, and George S. Howard argued that a statistically significant original psychology study followed by a nonsignificant single replication does not necessarily constitute a genuine failure to replicate, because the replication may have had low statistical power. | psychology | 2010s | global | gold | 0.983 | 3 | 6 | high |
1,421 | The 100 psychology studies replicated in the Reproducibility Project had originally been published in 2008 in Psychological Science, the Journal of Personality and Social Psychology, and the Journal of Experimental Psychology: Learning, Memory, and Cognition. | psychology | 2010s | global | silver | 0.925 | 2 | 3 | high |
1,426 | In August 2015, Science published the results of the Reproducibility Project, which attempted to replicate 100 experimental and correlational psychology studies. | psychology | 2010s | global | gold | 0.867 | 3 | 5 | high |
1,442 | Maxwell, Lau, and Howard proposed that multiple replications, rather than a single replication study, may be required to obtain enough statistical power to identify true psychological effects. | psychology | 2015 | global | gold | 0.867 | 3 | 5 | high |
1,373 | The original rotavirus vaccine was withdrawn from the market by its manufacturer, Wyeth Ayerst Laboratories, after only one year. | science | 1990s | United States | gold | 1 | 5 | 7 | high |
1,058 | The warming that ended the Younger Dryas took only about 40–50 years, with Greenland ice-core samples showing temperature increases of up to 10°C (18°F) in just a few decades. | science | prehistoric | Greenland/North Atlantic | gold | 1 | 4 | 8 | high |
203 | The Alais meteorite contains organic compounds. | science | 19th century (1806/1834 discovery) | France | gold | 1 | 4 | 7 | high |
542 | Cenograms are used in studying ancient communities to draw conclusions about a biome, including whether it is species rich, its relative humidity, and its level of forestation. | science | not_applicable | global | gold | 1 | 4 | 7 | high |
552 | Cenograms are used in studying ancient communities to draw conclusions about a biome's relative humidity. | science | prehistoric/paleontology | global | gold | 1 | 4 | 7 | high |
983 | Climate records preserved in Greenlandic ice show that Earth's last ice age included about 25 periods of abrupt climate change. | science | prehistoric | Greenland | silver | 1 | 4 | 7 | high |
396 | There is some evidence of lightning occurring on Venus. | science | 1978-present | Venus | gold | 1 | 4 | 6 | high |
550 | Cenograms are used to draw conclusions about a biome's characteristics, including whether it is species rich, its relative humidity, and its level of forestation. | science | not_applicable | global | gold | 1 | 4 | 6 | high |
716 | Above-threshold ionization (ATI) is a multi-photon effect in which an atom is ionized by absorbing more than the minimum number of photons energetically required for ionization. | science | modern | global | gold | 1 | 4 | 6 | high |
957 | According to NOAA, ocean pH has fallen by 0.1 units over the past 200 years, making ocean waters 30 percent more acidic. | science | 1800s-present | global | gold | 1 | 4 | 6 | high |
959 | Chelle Gentemann compared the Pacific Blob with sea-surface-temperature records dating back to 1910 and found its magnitude and duration were unprecedented in that historical record. | science | 2010s | North America / Pacific Ocean | gold | 1 | 4 | 6 | high |
1,257 | Rapamycin extended lifespan in both male and female UM-HET3 mice, with females showing a greater benefit than males (Harrison et al., 2009; Miller et al., 2011, 2014). | science | 2009-2014 | global | gold | 1 | 4 | 6 | high |
46 | Saturn's moon Titan has lakes and rivers of liquid methane and ethane, making it the only body in our solar system besides Earth with stable surface liquids. | space | modern | null | silver | 0.96 | 5 | 9 | high |
41 | A day on Venus is longer than its year—Venus takes 243 Earth days to rotate once but only 225 Earth days to orbit the Sun. | space | modern | null | gold | 0.92 | 5 | 8 | high |
44 | The footprints left by Apollo astronauts on the Moon will likely remain visible for millions of years because there is no wind or water to erase them. | space | 20th century | null | gold | 0.844 | 9 | 6 | high |
37 | GPS satellite clocks run faster than Earth-based clocks by 38 microseconds per day due to relativity effects, requiring constant correction. | technology | modern | global | silver | 0.99 | 5 | 8 | high |
925 | The Lunar Orbiters developed their film in space using Kodak's BIMAT transfer-processing system, a technology that remained classified by the Central Intelligence Agency until 2001. | technology | 1960s-2000s | United States | silver | 0.95 | 3 | 8 | high |
919 | Each Lunar Orbiter satellite carried two cameras—one high-resolution and one medium-resolution—and used 70-millimeter film rather than standard 35-millimeter film. | technology | 1960s | global | silver | 0.95 | 3 | 6 | high |
923 | Each Lunar Orbiter carried two cameras—one high-resolution and one medium-resolution—and used 70-millimeter film rather than standard 35-millimeter film. | technology | 1960s | global | gold | 0.95 | 3 | 6 | high |
926 | A single film-moving motor burned out on Lunar Orbiter 3 after it had captured a couple hundred frames, an incident that threatened the mission's success. | technology | 1960s | global | gold | 0.95 | 3 | 6 | high |
922 | Lunar Orbiter 3 photographed the Moon from February 15 to 23, 1967, and confirmed safe landing sites for the Apollo program. | technology | 1960s | global | silver | 0.95 | 3 | 3 | high |
1,392 | The authors of 'Crowdsourced wireless spectrum anomaly detection' develop schemes for generalizing user feedback across sensors to close the anomaly-detection loop. | technology | 2019 | global | gold | 0.95 | 3 | 3 | high |
195 | ADRON-RM is a neutron spectrometer designed to search for subsurface water ice and hydrated minerals. | technology | 2020s | Mars / global | gold | 0.925 | 4 | 4 | high |
847 | An advanced persistent threat (APT) is a stealthy cybersecurity threat typically orchestrated by a state or state-sponsored group. | technology | contemporary | global | gold | 0.925 | 4 | 3 | high |
907 | NASA's SNAP-10A satellite operated for 43 days before stopping. | technology | 1965 | United States | silver | 0.925 | 2 | 6 | high |
912 | A 100-kilowatt lunar nuclear reactor targeted by NASA is described as 10,000 times less powerful than a typical nuclear power plant. | technology | contemporary | global | silver | 0.925 | 2 | 6 | high |
125 | Quantum mechanics concepts and methods have been applied to quantum technology. | technology | contemporary | global | gold | 0.92 | 5 | 2 | high |
843 | A person professionally trained by a government to conduct intelligence operations may be called an intelligence officer. | world_events | contemporary | global | silver | 1 | 2 | 1 | high |
1,337 | According to Halena Gazelka, M.D., the COVID-19 pandemic indirectly caused a significant increase in opioid overdoses in the United States, primarily due to illicit-market drugs such as fentanyl rather than clinical overprescribing. | world_events | 2020s | United States | gold | 0.988 | 4 | 5 | high |
1,415 | HHS defines 'female' as a person with a reproductive system whose biological function is producing eggs, and 'male' as a person with a reproductive system whose biological function is producing sperm. | world_events | 2025 | United States | gold | 0.925 | 4 | 4 | high |
1,414 | On February 19, 2025, HHS issued guidance stating that the U.S. government would recognize only two sexes—male and female—defining sex as a person's 'immutable biological classification' as either male or female. | world_events | 2025 | United States | gold | 0.89 | 5 | 4 | high |
288 | The five recognized nuclear-weapons states under the NPT are also the five permanent members of the United Nations Security Council. | world_events | 20th century-present | global | gold | 0.838 | 4 | 4 | high |
433 | The Baltic Sea anomaly was discovered while the OceanX team was treasure hunting on the floor of the northern Baltic Sea. | world_events | 2011 | Baltic Sea, Northern Europe | silver | 0.833 | 3 | 6 | high |
436 | The Baltic Sea anomaly sonar image was taken by Peter Lindberg, Dennis Åsberg, and their Swedish OceanX diving team. | world_events | 2011-2012 | Baltic Sea, Sweden | silver | 0.833 | 3 | 4 | high |
285 | North Korea conducted its first successful nuclear test in 2006. | world_events | 2000s | North Korea | silver | 0.833 | 3 | 3 | high |
846 | Espionage can be illegal and punishable by law in some circumstances. | world_events | modern | global | silver | 0.833 | 3 | 1 | high |
1,405 | No other country with an established hepatitis B birth-dose vaccination policy had previously retreated from that recommendation before the U.S. ACIP vote. | world_events | 2025 | United States | silver | 0.812 | 4 | 7 | medium |
290 | North Korea acceded to the Non-Proliferation Treaty in 1985 before announcing its withdrawal in 2003. | world_events | 1985-2003 | North Korea | silver | 0.812 | 4 | 5 | high |
492 | Charles Darwin popularized the concept of evolution. | history | 19th century | United Kingdom | silver | 0.95 | 3 | 2 | high |
862 | New electronic forms of reconnaissance emerged as a sub-type of aerial reconnaissance during World War II. | history | 20th century (1939-1945) | global | gold | 0.925 | 4 | 5 | high |
166 | Abo Elementary School was listed on the National Register of Historic Places in 1999. | history | 1990s | United States | silver | 0.925 | 4 | 3 | high |
956 | The warm water of the Pacific Blob extended all the way to the U.S. West Coast by fall 2014. | nature | 2014 | North America (U.S. West Coast, Pacific Ocean) | gold | 0.983 | 3 | 5 | high |
938 | Super Typhoon Mangkhut, the strongest storm of 2018, produced winds exceeding 165 miles per hour before striking the Philippines in late September 2018. | nature | 2018 | Philippines / East Asia | silver | 0.983 | 3 | 3 | medium |
1,054 | During La Niña, the U.S. Southwest, central and southern Rockies, Great Plains, and Florida usually experience drier weather. | nature | contemporary | United States | gold | 0.983 | 3 | 3 | high |
1,343 | Brain bleeding associated with lecanemab or donanemab can rarely cause death, while serious brain swelling from these drugs can rarely cause seizures and other symptoms. | science | 2020s | global | silver | 1 | 4 | 6 | high |
651 | The term 'accelerating change' refers to the observed exponential nature of the rate of technological change throughout recent history. | technology | contemporary | global | gold | 0.9 | 4 | 3 | high |
198 | The Rosalind Franklin rover is planned to be launched not earlier than 2028. | technology | 2020s | global | gold | 0.89 | 5 | 3 | high |
DeepInquiry Verified Facts (Sample-100)
A 90-fact sample from the DeepInquiry verified-facts corpus. Every fact in this sample has been cross-checked against multiple structurally independent web sources, cited, dated, and confidence-scored before it entered the corpus.
This is a preview sample. The full corpus (~942 approved facts as of Sept 2026, growing continuously) is available via the DeepInquiry API at deepinquiry.ai/pricing and — pending qualification — via AWS Data Exchange.
TL;DR
- 90 verified facts across 8 categories
- Gold and Silver verification tiers only
- Median 3 independent source clusters per fact
- Every fact has an independence score (0.0–1.0) that penalizes wire-service duplicates and Wikipedia mirrors
- One fact per line in JSONL, ready to load with
datasets.load_dataset("deepinquiry/verified-facts-sample-100")orpandas.read_json(lines=True)
Dataset structure
Files
| File | Format | Rows |
|---|---|---|
data/train.jsonl |
Line-delimited JSON | 90 |
Fields
| Field | Type | Description |
|---|---|---|
id |
int | Stable fact identifier in the DeepInquiry corpus |
fact_text |
string | The verified fact statement (single sentence, usually 15–40 words) |
category |
string | One of: science, history, nature, technology, culture, world_events, psychology, space |
era |
string | Freeform era tag (ancient, medieval, modern, contemporary, or specific dates/decades) |
region |
string | Geographic scope (global, north_america, europe, specific countries, etc.) |
verification_tier |
string | gold or silver in this sample (bronze is unlocked in paid API tiers) |
independence_score |
float | 0.0–1.0. Higher = more structurally independent source clusters |
cluster_count |
int | Number of independent source clusters supporting the fact |
surprise_score |
int | 1–10 subjective "did you know?" scale (10 = most surprising) |
confidence_level |
string | high, medium, or low — an editorial confidence tag layered on top of the tier |
Sample record
{
"id": 31,
"fact_text": "Tardigrades can survive in the vacuum of space, withstand pressures six times greater than the deepest ocean trenches, and endure radiation doses 1,000 times what would kill a human.",
"category": "nature",
"era": "modern",
"region": "global",
"verification_tier": "silver",
"independence_score": 1.000,
"cluster_count": 7,
"surprise_score": 9,
"confidence_level": "high"
}
The full DeepInquiry API also returns a sources array on every response (URL, publisher, cluster ID, domain class). To keep this sample compact and portable, the sources array is omitted here — see the full API for the complete provenance trail per fact.
Loading the dataset
from datasets import load_dataset
ds = load_dataset("deepinquiry/verified-facts-sample-100")
print(ds["train"][0])
Or without datasets:
import pandas as pd
df = pd.read_json("data/train.jsonl", lines=True)
Verification methodology (short version)
Every fact in the DeepInquiry corpus goes through this pipeline before it becomes queryable:
- Candidate extraction. Claims are extracted from open-web sources across multiple domains.
- Multi-source corroboration. The pipeline searches for independent corroboration across the open web. A claim needs at least two structurally independent sources to advance.
- Independence scoring. Sources are clustered such that wire-service duplicates, syndicated re-posts, and Wikipedia mirrors are collapsed into a single cluster. The independence score reflects how many distinct clusters back the claim — not how many URLs happen to mention it.
- Verification tier. Facts are graded gold, silver, or bronze based on evidence strength (cluster count, source authority, cross-domain agreement).
- Citogenesis check. Facts are flagged when the source cluster shows signs of copying from a single seed (the "citation loop" problem in AI-generated content).
- Human-in-the-loop review. Approved facts enter the queryable corpus.
Wikipedia is cited when relevant but is excluded from the independence calculation — because Wikipedia mirrors are not independent sources of a claim.
Distribution
| Category | Count |
|---|---|
| history | 15 |
| nature | 15 |
| technology | 14 |
| science | 13 |
| culture | 12 |
| world_events | 11 |
| psychology | 7 |
| space | 3 |
| Tier | Count |
|---|---|
| gold | 50 |
| silver | 40 |
Intended uses
- RAG grounding. Use these facts as a curated upstream truth source for retrieval-augmented generation, where you want your LLM's outputs backed by evidence with a documented independence signal.
- Fact-checking research. Study how independence-scoring and cluster-count metadata affect downstream classifier or verifier training.
- Trivia and quiz apps. 90 facts across broad categories with a surprise score for user-facing curation.
- Edtech. Reference content where wrong facts have real user cost.
- Evaluation. Benchmark your own knowledge base or verification pipeline against a corpus that publishes its methodology.
Out-of-scope uses
- Not a legal, medical, or financial reference. These facts are verified as of the date they entered the corpus. The world changes; downstream applications for high-stakes decisions must validate against their own primary sources.
- Not a real-time news feed. DeepInquiry is a reference corpus, not a news API.
- Not a training-data substitute for LLMs. This is a sample. Training-scale use requires the full API and a data-license conversation.
- No PII, no sensitive-category data. The corpus is publicly-known facts about the world, not information about private individuals.
Limitations and biases
Small sample. 90 facts is not statistically representative of the ~942-fact full corpus and definitely not of "all human knowledge". Do not draw strong conclusions about coverage, geographic balance, or category balance from this sample alone.
Category skew in the full corpus. As of Sept 2026 the full DeepInquiry corpus over-indexes on science (55% of approved facts), history (26%), and nature (~6%). Other categories are actively growing. This 90-fact sample rebalances to 8 categories with ~12–15 facts each, so it is intentionally more balanced than the underlying corpus. Downstream users who assume the full corpus has this balance will be surprised.
English-only. All facts in this sample and in the current DeepInquiry corpus are English-language. Multilingual coverage is on the roadmap.
Western-source bias. Independent web sources still skew heavily toward US and Western European publishers. A fact scoring 1.0 on independence still probably means "corroborated across multiple Western newsrooms" not "corroborated across globally distributed sources." We are actively broadening the source pool but this bias is real today.
Verification is not omniscience. A gold-tier fact is a fact where multiple independent sources agreed at the time of verification. It is not a guarantee of factual correctness — the sources themselves may have been wrong.
Snapshot in time. This sample was extracted from the corpus on 2026-09-01. Facts in the live corpus may have been updated, re-verified, or deprecated since.
Ethical considerations
- No sensitive personal data. The corpus contains no PII. All people mentioned are public figures or historical persons.
- Sources are cited on every API response. In this sample the
sourcesfield is omitted for compactness, but the full DeepInquiry API always returns the source cluster. If you build a product on this sample and later want the full sourcing, upgrade to the API. - Independence scoring is a signal, not a truth-o-meter. A fact with independence_score = 1.0 is a fact with high structural source diversity. It is not a claim that we've solved epistemology.
License
CC BY 4.0 — Creative Commons Attribution 4.0 International.
You may use, redistribute, remix, and build on this dataset for any purpose (including commercial), as long as you provide attribution:
DeepInquiry Verified Facts (Sample-100), Epic Sky LLC, licensed under CC BY 4.0. Source: https://huggingface.co/datasets/deepinquiry/verified-facts-sample-100
The DeepInquiry API and full corpus are commercially licensed separately — see deepinquiry.ai/pricing.
Full API
If you want:
- The full ~942-fact corpus (growing continuously)
- The complete
sourcesarray with URLs, publisher, cluster ID, and domain class on every fact - Bronze-tier facts in addition to Gold and Silver
- Search, filter, and per-fact lookup endpoints
- Audit-mode fields for compliance and governance workflows
→ Subscribe at deepinquiry.ai/pricing — Free tier is 500 requests / month with silver+ facts. Paid tiers start at $29 / month.
Coming soon on AWS Data Exchange.
Citation
If you use this dataset in research or a product, please cite:
@misc{deepinquiry_sample_100,
author = {Rush, Bryan and {Epic Sky LLC}},
title = {DeepInquiry Verified Facts (Sample-100)},
year = {2026},
publisher = {Hugging Face},
howpublished = {\url{https://huggingface.co/datasets/deepinquiry/verified-facts-sample-100}},
note = {A verified-facts sample from the DeepInquiry corpus, licensed under CC BY 4.0}
}
Contact
- Web: deepinquiry.ai
- Publisher: Epic Sky LLC
- Hugging Face issues: open a discussion in the Community tab
- API support: hello@deepinquiry.ai
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