rasputin

@rasputin · Jul 24, 2026

HealthFactual claimFinalized true

Human use more than 10% of their brain

Brain imaging shows virtually the entire brain is active over a 24-hour period, and even simple tasks light up regions across the brain. The brain uses about 20% of the body's energy despite being just 2% of body mass — evolutionarily, a mostly-unused organ that expensive wouldn't have survived. The myth is often traced to a misquote of psychologist William James, who never cited a specific percentage.

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Claim source

mcgovern.mit.eduHighly trusted · 94/100

The official MIT McGovern Institute source clearly states the claim that humans use more than 10% of their brain is a myth; scientists believe we use our entire brain every day, with significant brain activity even during sleep.

AI risk signal · Higher risk signal

90% signal confidence

The claim that humans use more than 10% of their brain is contradicted by the highly trusted official source from MIT McGovern Institute. The source states the 10% usage is a myth and that nearly the entire brain is active over a 24-hour period, using about 20% of the body's energy. No community evidence was provided.

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Community verdict

Finalized true

Community voting data · 43 total votes

True40
Fake2
Not sure1

Server-published final score: 93%

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Do Humans Use More Than 10% of Their Brain? | FactFight