2,554 published verifications avg. score 5.6/10 1,246 rated true or mostly true 1,065 rated false or mostly false
“Controlled use of fire appears in the archaeological record at least 400,000 years ago.”
Evidence strongly supports that hominins had controlled fire in the archaeological record by at least 400,000 years ago. Multiple well-regarded studies also report earlier evidence, including Wonderwerk Cave at around 1 million years ago. The main caveat is terminological: archaeologists distinguish between controlled use, habitual use, and fire-making.
“By around 200,000 years ago, cooking was almost certainly widespread among Homo sapiens.”
Available evidence does not justify saying cooking was almost certainly widespread among Homo sapiens by around 200,000 years ago. The strongest sources say the timing of widespread adoption is unclear, while the clearest Homo sapiens-specific evidence appears later and at particular sites rather than across the species. There is a real kernel of truth—cooking likely has deeper roots in earlier hominins—but this claim overstates both the certainty and the date.
“In prehistoric human societies, tasks were divided based on physical condition, age, and skill rather than rigid gender roles.”
Available anthropological and archaeological evidence indicates prehistoric labor was more flexible than a rigid male-hunter/female-gatherer model. Tasks were often shaped by age, physical condition, childcare status, ecology, and skill. However, the evidence does not show gender played no role; it suggests gender was one factor among several, usually in non-absolute ways.
“The First Chechen War ended in 1996 with an agreement and a temporary withdrawal of Russian forces.”
The claim is broadly accurate: the First Chechen War’s active fighting ended in 1996 with the Khasavyurt agreements, followed by the withdrawal of Russian forces by year’s end. The main caveat is that the 1996 deal was a ceasefire-style accord rather than the final formal peace treaty, which came in 1997. Also, the withdrawal was complete in 1996; calling it “temporary” is retrospective shorthand.
“Contemporary observers recognized that expelling Jews from Spain would cause economic damage.”
The historical evidence shows that some contemporaries did anticipate economic harm from expelling Jews from Spain. Scholarly sources describe municipal elites and other observers warning about the loss of taxpayers, financial expertise, and skilled residents. But the record supports a limited claim about identifiable observers, not a broad contemporaneous consensus, and the famous Bayezid II quote is not solid contemporaneous evidence.
“In late-15th-century Spain, Jews comprised a disproportionate share of essential professionals, including physicians, administrators, tax collectors, translators, and traders.”
The evidence shows notable Jewish overrepresentation in some influential roles in late-medieval Spain, especially tax collection, fiscal administration, and some medical positions. But the claim overextends that pattern across all the listed professions and the specific late-15th-century timeframe. Evidence for translators and traders is weaker, and many Jews were still modest artisans or small merchants rather than elite professionals.
“Carbon is an essential building block of life.”
Carbon is a core structural element of known life. Scientific sources consistently show that carbon forms the backbone of the main biological macromolecules because it can make stable, complex bonds in ways crucial to biochemistry. The claim is accurate as stated, though it refers to life as known on Earth and does not imply carbon is the only essential element.
“Photosynthesis by plants, algae, and some bacteria removes carbon dioxide from the atmosphere and converts it into sugars using sunlight.”
The core description matches standard biology. In plants, algae, and photosynthetic bacteria such as cyanobacteria, sunlight drives carbon fixation, turning CO2 into carbohydrates including sugars. The main caveat is that bacterial photosynthesis is diverse, so the exact pathway is not identical across all bacteria.
“The ocean stores more carbon than the atmosphere.”
The scientific evidence shows the ocean holds far more carbon than the atmosphere. Standard carbon-cycle estimates put ocean carbon at roughly 38,000 gigatons of carbon, compared with about 800-900 gigatons in the atmosphere. Caveats about deep-ocean storage or exchange rates do not change the basic comparison the claim makes.
“Human activity has significantly altered the natural balance of the carbon cycle, especially since the Industrial Revolution.”
The evidence shows a major human-driven disruption of the carbon cycle since the Industrial Revolution. IPCC, NASA, and NOAA assessments document a large rise in atmospheric CO2, fossil-fuel isotopic fingerprints, and partial uptake by land and oceans that still leaves substantial net accumulation. The core claim is strongly supported.
“Claude AI cannot directly crack Bitcoin encryption or hack into a blockchain.”
Available evidence shows Claude cannot break Bitcoin’s secp256k1 cryptography or penetrate the Bitcoin blockchain by itself. Stories about AI “cracking” wallets refer to password recovery, file analysis, or other user-side help, not a break of Bitcoin’s protocol. The main caveat is that AI can still assist attacks on users, wallets, exchanges, or vulnerable blockchain software.
“Having greater muscle mass makes it easier for the body to eliminate estrogen.”
The evidence does not support muscle mass as a meaningful driver of estrogen elimination. Estrogen is cleared mainly through liver metabolism and biliary/renal excretion, while muscle-related studies describe local hormone activity within muscle rather than whole-body clearance. Exercise can be associated with lower estrogen in some contexts, but that is more consistently tied to reduced fat mass than to having more muscle.
“Stellar nucleosynthesis inside stars combines smaller nuclei into heavier elements.”
The statement accurately describes the core process of stellar nucleosynthesis in stars. Standard astrophysics sources explain that stars build heavier nuclei from lighter ones mainly through nuclear fusion. Important nuance remains: ordinary stellar fusion mostly makes elements up to iron, while many heavier elements require neutron-capture or explosive events.
“Hydrogen and helium were the first elements formed after the Big Bang.”
The evidence shows that the earliest primordial elements were hydrogen and helium, formed in the first minutes after the Big Bang. Authoritative cosmology sources consistently describe them as the first and dominant products of Big Bang nucleosynthesis. Small amounts of other light nuclides, especially lithium-7, were also produced, but that does not overturn the claim’s core meaning.
“Red giants and red supergiants produce elements up to iron through nuclear fusion.”
The statement mixes two very different kinds of stars. Red supergiants can build up to iron in their cores through successive fusion stages, but ordinary red giants do not get that far and generally stop around carbon and oxygen. It also blurs the fact that much iron-peak material released into space is made during the supernova explosion, not just during the red-supergiant phase.
“Supernova explosions create and scatter elements heavier than iron across space.”
The evidence shows that supernovae do both produce some elements heavier than iron and disperse them through space. NASA, DOE, and review literature support that role in nucleosynthesis and galactic enrichment. The main caveat is that supernovae are not the only major source of heavy elements, and may not be the dominant source for the very heaviest r-process elements.
“In a ball-and-stick model of oxygen gas (O2), the bond between the two oxygen atoms is curved because of technical issues with the plastic stick.”
Standard ball-and-stick models of O2 do not use a curved bond. Reliable chemistry sources describe oxygen as linear and represent the O–O bond with a straight connector. If a classroom model appears curved, that usually reflects a bent or worn piece in a particular kit, or an intentional kit design choice, not a general fact that O2 models are curved because of plastic technical problems.
“A dioxygen molecule (O2) has a bent (curved) molecular geometry.”
Standard chemistry definitions do not support this statement. O2 is a diatomic molecule, and diatomic molecules are classified as linear because two nuclei define a straight line. References to electron density or vibration do not change the formal molecular geometry to bent.
“U.S. Attorney General Pam Bondi asked a federal judge in New York to deny the appointment of a special master to monitor the release of the "Epstein files."”
Reporting from Reuters and other outlets shows the Justice Department asked a New York federal judge to reject a request for a special master over the Epstein files, and Pam Bondi was a signatory to that filing. The key caveat is that the request was made jointly with Deputy Attorney General Todd Blanche, not by Bondi alone. That does not alter the substance of the claim.
“On August 22, 2025, the United States Department of Justice produced approximately 33,000 pages to the U.S. House Committee on Oversight and Government Reform, and those pages were already public.”
The date, sender, recipient, and approximate size of the production are well-supported by official records and contemporaneous reporting. The only meaningful caveat is that the tranche was not literally all already public: credible reports indicate a small portion, roughly 3%, included newly disclosed material. The overall takeaway remains that DOJ mostly turned over already public or previously shared records.