1446 published verifications avg. score 5.1/10 578 rated true or mostly true 851 rated false or misleading
“Drinking eight glasses of water per day is the optimal daily water intake for human health.”
This claim is false. No scientific evidence supports "eight glasses of water per day" as the optimal intake for human health. The National Academies explicitly state there is no single daily water requirement, and a peer-reviewed review in the American Journal of Physiology found zero studies backing the "8×8" rule. Actual water needs vary significantly by sex, body size, activity level, climate, and diet, and roughly 20–30% of daily water intake comes from food. Every major health authority rejects this as a myth.
“Marie Antoinette said the phrase "Let them eat cake" in response to being told that peasants had no bread.”
This claim is false. There is no historical evidence that Marie Antoinette ever said "Let them eat cake." The phrase predates her, appearing in Rousseau's Confessions (written 1765–1769) attributed to an unnamed princess when Marie Antoinette was still a child in Austria. The first printed attribution to her appeared only in 1843 — fifty years after her execution. Multiple authoritative sources confirm the quote is a myth rooted in political propaganda, not a documented historical event.
“The full moon causes an increase in unusual human behavior and events.”
The claim that full moons cause increased unusual human behavior is not supported by scientific evidence. Multiple large-scale studies, meta-analyses, and medical reviews consistently find no meaningful increase in ER visits, psychiatric admissions, crime, or other "unusual events" during full moons. While some isolated studies report small correlations with specific subgroups (e.g., sleep disruption or certain psychiatric conditions), these findings are inconsistent, not replicated at scale, and do not establish causation. This is a persistent cultural myth contradicted by the weight of research.
“Approximately half of the cells in the human body are non-human cells, primarily composed of microorganisms such as bacteria.”
The claim is largely accurate. The best peer-reviewed research (Sender et al., 2016) estimates ~38 trillion bacterial cells versus ~30 trillion human cells, making bacteria roughly 56% of all cells — reasonably described as "approximately half." However, this is a point estimate for a 70 kg adult male with significant uncertainty (~25%) and population variation. The claim also omits that by mass, bacteria account for only ~0.2 kg, so "approximately half" applies to cell count, not biological dominance.
“Stretching before exercise prevents muscle soreness and injuries.”
This claim is not supported by the best available evidence. Multiple high-quality systematic reviews, including a 2022 Cochrane review, consistently find that stretching before exercise does not produce clinically meaningful reductions in muscle soreness (DOMS) and does not significantly reduce general injury risk. While some newer research suggests specific stretching types (e.g., individualized active stretching) may help in narrow contexts, these tentative findings do not support the broad, blanket claim as stated.
“The Tyrannosaurus Rex lived closer in time to modern humans than to the Stegosaurus.”
This claim is true and well-established in paleontology. Stegosaurus lived ~150 million years ago, while T. rex lived ~68–66 million years ago — a gap of ~80–84 million years. T. rex went extinct ~66 million years ago, and modern humans appeared ~300,000 years ago — a gap of ~66 million years. Since 66 million years is less than 80–84 million years, T. rex indeed lived closer in time to us than to Stegosaurus. Multiple authoritative sources, including USGS and the Natural History Museum, confirm this.
“Bananas are radioactive due to their natural potassium-40 content.”
This claim is true. Bananas contain potassium-40 (K-40), a naturally occurring radioactive isotope that makes up about 0.012% of all potassium. This is confirmed by the US EPA, the Department of Energy, and peer-reviewed scientific literature. However, the radioactivity is extremely small — about 0.1 microsieverts per banana — and eating bananas does not increase your net radiation dose because the body maintains potassium balance and excretes excess potassium. Bananas pose no radiation health risk.
“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.