# Lenz

> Human-reviewed fact-checking platform that uses AI to research claims across multiple independent sources and score truthfulness on a scale of 1–10.

Lenz is a fact-checking tool that uses AI to verify claims and rate their truthfulness. Users submit any claim — something they heard, read, or saw online — and receive a structured fact-check report. The pipeline uses AI to frame the claim, research it across the web, stage a debate between models arguing each side, then convene a panel of three adjudicators who evaluate source reliability, logical consistency, and contextual accuracy. The result is a conclusion label (True, Mostly True, Misleading, or False) and an Lenz Score from 1 to 10. All claims in the Library also undergo human verification at a later stage, where an editor independently reviews the analysis for quality and accuracy.

All verified claims are published in a public Library at https://lenz.io/library.

## How It Works

- [How It Works](https://lenz.io/how-it-works): Five-step fact-checking pipeline from claim framing to conclusion, plus human verification

## Fact-Checked Claims

- [Is Excessive Sugar from Fresh Fruit a Myth?](https://lenz.io/c/excessive-sugar-consumption-fresh-fruit-5b53da18): Mostly True — 7.0/10
- [Is Earth's sea level actually flat around the world?](https://lenz.io/c/sea-level-variations-global-differences-84513d03): True — 9.0/10
- [Can Sound Actually Have Negative Decibels?](https://lenz.io/c/sound-negative-decibel-level-f22830be): True — 9.0/10
- [Are some species really biologically immortal?](https://lenz.io/c/biologically-immortal-species-ee3e35e7): Misleading — 5.0/10
- [Does your brain really hog 20% of your energy?](https://lenz.io/c/human-brain-oxygen-calorie-usage-a0dc6227): Mostly True — 7.0/10
- [Can carbon capture really solve our climate crisis?](https://lenz.io/c/carbon-capture-storage-effectiveness-scalability-net-zero-9d6bcda4): False — 3.0/10
- [Will CBDCs really compromise your financial privacy?](https://lenz.io/c/cbdc-financial-privacy-loss-ordinary-citizens-cb387d0e): Misleading — 5.0/10
- [Do Generative AI Models Really Produce Inaccuracies?](https://lenz.io/c/generative-ai-models-factual-inaccuracies-c8d17b44): Mostly True — 7.0/10
- [Is common law marriage valid in all 50 US states?](https://lenz.io/c/common-law-marriage-recognition-us-states-e26ba9fc): False — 2.0/10
- [Is Deglobalization Really Threatening Western Growth?](https://lenz.io/c/deglobalization-threat-western-economic-growth-a3311e75): Misleading — 5.0/10
- [Is Flushing Medications Really Safe?](https://lenz.io/c/prescription-medication-toilet-disposal-safety-578f811c): False — 2.0/10
- [Is standardized testing the best way to measure student apti](https://lenz.io/c/standardized-testing-effectiveness-student-aptitude-prediction-1bb05dcd): False — 3.0/10
- [Do learning styles actually improve how students learn?](https://lenz.io/c/teaching-learning-styles-improves-outcomes-4e6defbf): False — 2.0/10
- [Does the five-second rule really prevent bacteria transfer?](https://lenz.io/c/five-second-rule-bacteria-transfer-5fcda2e9): False — 2.0/10
- [Will Ozempic and Wegovy Revolutionize Public Health?](https://lenz.io/c/ozempic-wegovy-public-health-transformation-8ea8c11a): Misleading — 5.0/10
- [Can honey really never spoil? What science actually reveals](https://lenz.io/c/honey-spoilage-preservation-properties-1f2c0a8b): False — 3.0/10
- [Does spicy food actually cause stomach ulcers?](https://lenz.io/c/spicy-food-stomach-ulcers-causation-ddbe62f9): False — 2.0/10
- [Has Social Media Boosted Young Adults' Mental Health Issues?](https://lenz.io/c/mental-health-young-adults-social-media-western-countries-cdb8ab89): False — 3.0/10
- [Is Owning a Home Really Cheaper Than Renting?](https://lenz.io/c/financial-benefits-owning-home-vs-renting-c37acae2): False — 3.0/10
- [Do current AI laws actually protect us from ethical risks?](https://lenz.io/c/legal-frameworks-autonomous-ai-ethics-adequacy-f4be4790): False — 3.0/10
- [Was the Sahara really once a green paradise?](https://lenz.io/c/sahara-desert-historical-green-landscape-86f218e6): True — 9.0/10
- [Can worms really regenerate after being cut in half?](https://lenz.io/c/worm-regeneration-after-being-cut-7cbac045): True — 9.0/10
- [Are tomatoes actually vegetables or fruits?](https://lenz.io/c/tomato-vegetable-classification-c7cee980): Misleading — 5.0/10
- [Can live sports really be deepfaked?](https://lenz.io/c/live-sports-deepfake-technology-limitations-3fcb0f60): False — 2.0/10
- [Will cryptocurrency really replace traditional banks?](https://lenz.io/c/cryptocurrency-replace-traditional-banks-5c946fe3): False — 2.0/10
- [Will AI actually replace human accountants by 2036?](https://lenz.io/c/ai-accounting-automation-next-decade-2026-2036-48751d12): Mostly True — 7.0/10
- [Are telomerase-activating supplements really safe?](https://lenz.io/c/telomerase-activating-supplements-safety-a90b26bd): Misleading — 5.0/10
- [Is Indoor SPF Use Really Necessary?](https://lenz.io/c/spf-indoors-skincare-protection-recommendation-45a98e71): Misleading — 5.0/10
- [Is fasting really off-limits for women over 50?](https://lenz.io/c/fasting-recommendations-women-over-50-e4f245c8): False — 2.0/10
- [Did Kristi Noem Claim the Bible Was in English?](https://lenz.io/c/kristi-noem-bible-written-english-statement-cb42f56c): False — 2.0/10
- [Does Coffee Really Dehydrate You?](https://lenz.io/c/coffee-dehydration-effects-caffeine-af2c2671): False — 2.0/10
- [Can cats actually live over 30 years?](https://lenz.io/c/cats-lifespan-30-years-maximum-797e3e5f): True — 9.0/10
- [Can water bears really survive in outer space?](https://lenz.io/c/water-bears-survive-space-travel-ddbcdeb8): True — 9.0/10
- [Can animals really be allergic to humans?](https://lenz.io/c/animals-allergic-humans-reactions-cf2b5810): Mostly True — 8.0/10
- [Does romantic love really expire after three years?](https://lenz.io/c/romantic-love-duration-three-years-7410c875): False — 3.0/10
- [Is anorexia really classified as a mental health condition?](https://lenz.io/c/anorexia-mental-health-classification-4e8d23f9): True — 9.0/10
- [Is the BMW R1300GS really the best adventure motorcycle?](https://lenz.io/c/bmw-r1300gs-best-adventure-motorcycle-2026-c6074215): Misleading — 5.0/10
- [Does Africa really span all four hemispheres?](https://lenz.io/c/africa-four-hemispheres-geography-44aed096): True — 9.0/10
- [Would bacteria really stretch 10 billion light-years?](https://lenz.io/c/bacteria-stacked-10-billion-light-years-earth-932a058b): Misleading — 6.0/10
- [Is it true that half of our body cells aren't human?](https://lenz.io/c/human-body-cells-non-human-microbiome-ratio-fa34c907): Mostly True — 7.0/10
- [Does groundwater really contain 60 times more water than la…](https://lenz.io/c/underground-freshwater-reserves-rivers-lakes-comparison-ce1ed2e8): Mostly True — 8.0/10
- [Can diamonds really be made from peanut butter?](https://lenz.io/c/diamonds-manufactured-peanut-butter-5f847e4f): Mostly True — 7.0/10
- [Did T. rex really live closer to humans than Stegosaurus?](https://lenz.io/c/tyrannosaurus-rex-stegosaurus-temporal-distance-humans-798fba2e): Mostly True — 8.0/10
- [Does stretching really prevent muscle soreness?](https://lenz.io/c/stretching-exercise-prevents-soreness-injuries-6eb1ebb1): False — 3.0/10
- [Is it illegal to drive with your interior light on?](https://lenz.io/c/driving-interior-light-illegal-car-laws-cffe61cb): False — 2.0/10
- [Does sugar really make kids hyperactive?](https://lenz.io/c/sugar-causes-hyperactivity-children-ca24ae2e): False — 2.0/10
- [Did Marie Antoinette really say 'Let them eat cake'?](https://lenz.io/c/marie-antoinette-let-them-eat-cake-quote-8c9aad62): False — 2.0/10
- [Do humans really only use 10% of their brain?](https://lenz.io/c/humans-10-percent-brain-capacity-usage-973ee4de): False — 1.0/10
- [Does the full moon really cause strange behavior?](https://lenz.io/c/full-moon-human-behavior-unusual-events-308c5644): False — 3.0/10
- [Is it true that you need eight glasses of water daily?](https://lenz.io/c/eight-glasses-water-daily-optimal-health-19f13a68): False — 2.0/10

## Policies

- [Terms of Use](https://lenz.io/terms): Terms and conditions for using Lenz
- [Privacy Policy](https://lenz.io/privacy): How we collect, use, and protect personal information
- [Contact](https://lenz.io/contact): Get in touch with the Lenz team

## Optional

- [Claim Library](https://lenz.io/library): Browse all fact-checked claims by domain, entity, or search