959 published verifications avg. score 4.7/10 329 rated true or mostly true 629 rated false or misleading
“Plastic waste eventually biodegrades in landfills.”
This claim is false. The overwhelming scientific evidence shows that conventional plastics (polyethylene, polypropylene, PET, etc.) do not biodegrade in landfills. Landfill conditions — anaerobic, UV-limited, and compacted — are hostile to biodegradation. Most plastics persist for centuries, merely fragmenting into microplastics rather than truly breaking down into CO₂, water, and biomass. Even plastics marketed as "biodegradable" often fail to biodegrade under real landfill conditions. The claim gives a dangerously misleading impression that landfills naturally resolve plastic pollution.
“Adverse possession laws in the United States allow a person to gain legal ownership of property by occupying it without permission for a statutory period.”
The claim is broadly accurate. U.S. adverse possession laws do allow a person to gain legal ownership of property by occupying it without the owner's permission for a state-defined statutory period. However, the claim simplifies the doctrine: courts also require that possession be open and notorious, exclusive, and continuous — and some states impose additional conditions like paying property taxes. Statutory periods vary widely (5–30 years) across jurisdictions. The core proposition is correct, but the framing omits important legal requirements.
“Humans use the left hemisphere of the brain primarily for logical thinking and the right hemisphere primarily for creative thinking.”
This claim is a well-known neuromyth. While some hemispheric specialization exists — the left hemisphere contributes more to language processing, for example — modern neuroscience consistently shows that both logic and creativity involve extensive collaboration between both hemispheres. Large-scale fMRI studies find no evidence of global hemispheric dominance for these functions. Creativity in particular relies on bilateral brain networks, and some studies even show increased left-hemisphere activity during creative tasks. The word "primarily" makes this claim false.
“The human stomach can dissolve razor blades through its digestive acids.”
This claim is false as commonly understood. While stomach acid (pH ~1–2) is highly corrosive and can slowly corrode metal in laboratory settings — one study showed ~37% mass loss after 24 hours in simulated gastric juice — food and foreign objects typically remain in the stomach for only 30–120 minutes. Medical case reports consistently show ingested razor blades passing through or being surgically removed intact, not dissolved. The claim conflates a lab demonstration of slow corrosion with actual digestive capability.
“Cleopatra lived closer in time to the first moon landing in 1969 than to the construction of the Great Pyramid of Giza.”
This claim is true. Cleopatra died in 30 BCE, roughly 2,000 years before the 1969 moon landing. The Great Pyramid of Giza was completed around 2500–2570 BCE, placing it roughly 2,450–2,540 years before Cleopatra. Since the gap to the pyramid is consistently several centuries larger than the gap to the moon landing, Cleopatra indeed lived closer in time to the Apollo 11 mission than to the construction of the Great Pyramid.
“Fortune cookies originated in China.”
Fortune cookies did not originate in China. Multiple authoritative sources — including the Library of Congress and History.com — place their invention in early 1900s California, most commonly crediting Japanese-American Makoto Hagiwara (1914, San Francisco) or Chinese-American David Jung (1918, Los Angeles). The often-cited 14th-century Chinese moon cake story is characterized as speculative legend, not documented history. Chinese restaurants later popularized the cookies, but the treat itself is an American creation with Japanese antecedents.
“Napoleon Bonaparte was shorter than the average adult male of his time.”
This claim is false. Napoleon's recorded height of "5 pieds 2 pouces" was in pre-metric French units, which converts to approximately 1.67–1.69 m (about 5'7"). The average French adult male of his era stood roughly 1.64–1.65 m. Napoleon was therefore average or slightly above average height. The widespread myth stems from a unit-conversion error and British propaganda, not from historical fact. Multiple authoritative sources—including Encyclopædia Britannica and History.com—explicitly debunk this misconception.
“There are more stars in the Milky Way galaxy than there are trees on Earth.”
This claim is false — it gets the comparison backwards. NASA and ESA estimate the Milky Way contains roughly 100–400 billion stars, while a landmark 2015 Yale/Nature study estimates approximately 3 trillion trees on Earth. Even using the highest credible star estimates, trees outnumber Milky Way stars by a factor of roughly 7 to 30. The popular belief that stars vastly outnumber trees is a common misconception.
“ADHD is overdiagnosed in adults in recent years.”
Adult ADHD diagnoses have clearly risen in recent years — about 6% of U.S. adults reported a current diagnosis in 2023, with many first diagnosed in adulthood. Some experts have raised legitimate concerns about diagnostic validity and possible overdiagnosis. However, the claim states overdiagnosis as established fact, which the evidence does not support. Rising diagnoses may reflect correction of longstanding underdiagnosis, particularly in women and minorities, and some studies show stable underlying prevalence. The claim conflates increased diagnosis with proven overdiagnosis.
“There is evidence that Jim Simons' investment success was primarily due to luck rather than skill or strategy.”
The claim that Jim Simons' investment success was primarily due to luck is not supported by the evidence. The academic studies cited analyze hedge funds broadly and never examined Renaissance Technologies or the Medallion Fund specifically. Applying population-level luck statistics to one individual is a logical fallacy. Multiple detailed sources describe Simons' decades-long, systematic quantitative strategy with consistent, crisis-resistant returns — a pattern far more consistent with skill than luck. A generic life quote about "good fortune" does not constitute evidence that Medallion's returns were luck-driven.
“Reading in low light causes permanent damage to eyesight.”
This claim is a widely debunked myth. Multiple credible medical and optometric sources — including the Canadian Association of Optometrists, Prevent Blindness, and University of Utah Health — confirm that reading in low light may cause temporary eye strain, discomfort, or headaches, but does not cause permanent damage to eyesight. These symptoms resolve with rest. No credible clinical evidence supports the idea that dim-light reading leads to lasting structural harm to the eyes.
“Engine displacement is considered one of the most important characteristics of an engine.”
The claim that engine displacement is "one of the most important" engine characteristics is well-supported. Multiple credible sources — including Chase.com, The Drive, and automotive training references — describe displacement as "key," "crucial," and "fundamental" to engine performance and classification. The claim uses modest, non-exclusive language ("one of"), which is consistent with the fact that other parameters (compression ratio, turbocharging, valve timing) also matter significantly. No credible source disputes displacement's top-tier status among engine characteristics.
“Sexual orientation, specifically being gay, is primarily a result of psychological factors or social influence rather than innate biological factors, and it can be changed.”
This claim is false. The overwhelming scientific and medical consensus — from the APA, NIH, and major research institutions — holds that sexual orientation is substantially influenced by biological, genetic, hormonal, and early developmental factors, not primarily by psychological or social influence. There is no credible evidence that sexual orientation can be durably changed through intervention. Conversion therapy efforts have been found ineffective and linked to serious mental health harms including depression, PTSD, and suicidality.
“Consuming ginger after eating sushi kills most of the parasites that may be present in the sushi.”
This claim is false. While lab studies show ginger compounds can kill certain parasites at specific concentrations, there is no clinical evidence that the small amount of pickled ginger served with sushi achieves parasiticidal effects in humans. Public health authorities consistently identify freezing — not condiments — as the reliable method for controlling parasites in raw fish. The ginger served with sushi is traditionally a palate cleanser, not a food safety measure.
“It is possible to use artificial intelligence to develop an investment strategy that consistently outperforms the stock market.”
The claim that AI can "consistently" outperform the stock market is not supported by the available evidence. While AI-driven strategies have shown impressive results in specific contexts — competition rankings, single strong years, and research frameworks — no source demonstrates durable, net-of-fees outperformance across multiple market regimes. Academic research and institutional analysis indicate that as AI adoption spreads, the very edges it exploits tend to erode through increased market efficiency, transaction costs, and crowding effects.
“Abyssinian cats learn tricks faster than all other cat breeds.”
This claim is false. While Abyssinians are widely regarded as one of the smartest and most trainable cat breeds, no scientific study has ever demonstrated they learn tricks faster than all other breeds. Multiple sources highlight Bengals, Cornish Rex, Devon Rex, and Siamese as comparably quick learners. Veterinary experts also emphasize that trainability varies more by individual cat than by breed, making the absolute superlative "faster than all other breeds" unsupported.
“Blue light emitted from smartphones causes permanent retinal damage.”
This claim is false. While high-intensity blue light can damage retinal cells in laboratory settings, the American Academy of Ophthalmology, Harvard Health, and a 2023 NIH review all state there is no evidence that blue light from smartphones causes permanent retinal damage under normal use. Studies cited in support either used unrealistic exposure intensities, animal models, or showed only statistical associations — not causation. The primary proven harms of prolonged screen use are digital eye strain and sleep disruption, not permanent retinal damage.
“Sugar-free drinks cause cancer in humans.”
The claim that sugar-free drinks cause cancer in humans is not supported by the scientific evidence. The strongest classification any authority has issued — IARC's Group 2B for aspartame — means only "possibly carcinogenic" based on limited, unconvincing evidence. A 2025 umbrella meta-analysis found no significant association between artificially sweetened beverages and cancer risk (RR: 0.98), and a 2025 systematic review found no consistent link for any sweetener or cancer type. The claim overstates uncertain, preliminary signals as established causation.
“Squats are more effective than leg press exercises for muscle hypertrophy.”
The claim that squats are categorically more effective than leg press for muscle hypertrophy is misleading. While one peer-reviewed study found squats superior in an 8-week protocol, the broader scientific evidence indicates that when training volume and intensity are matched, both exercises produce comparable overall muscle growth, with each favoring different muscle regions. Squats recruit more total muscle mass, but this does not automatically translate to greater hypertrophy in any specific muscle group. The blanket claim oversimplifies a nuanced, context-dependent reality.
“Yawning occurs to increase oxygen intake before sleep.”
This claim is false. The idea that yawning exists to increase oxygen intake has been largely abandoned by the scientific community. Controlled experiments show that changing oxygen or CO₂ levels does not affect yawning frequency. While yawning does involve a deep breath, this is not its purpose. Current research points instead to brain cooling, sleep-wake state transitions, and arousal regulation as the primary functions of yawning. The "before sleep" framing adds an additional unsupported specificity.