SpinkillerAI — AI-Powered Fact-Checker
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We only use 10% of our brains.
False
Accuracy: False. False. The supplied passages directly contradict the claim: Harvard says brain scans show people “regularly use all of the brain,” with no part known to be unused or unnecessary, and Smithsonian/Nature Scitable say PET/fMRI show much of the brain is active even during simple tasks and small lesions can cause major deficits. A nuance remains that not every cell fires at once and some reserves/plasticity exist, but that does not support “only 10%.”
Verdict confidence: 96/100. Direct excerpts explicitly say the 10% claim is false and give decisive contrary evidence: brain imaging shows broad activity, no brain part is known to be unused, and even small injuries can cause major deficits [S3P1, S3P2, S4P1, S5P2, S5P3]. Remaining limitation: imaging is imperfect and not every cell fires at once [S3P1, S3P2]. Method: verdict-evidence-v1. Not a calibrated probability.