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We only use 10% of our brains.
False
Accuracy: False. False. The supplied neuroscience sources directly say the 10% claim lacks scientific support and is a neuromyth. CNRS says there is “absolutely no scientific evidence” for it and cites lesion studies plus activity measures showing no redundant or entirely silent brain region (S1P1-S1P3). Harvard likewise says brain scans show people regularly use all of the brain and calls the claim “100% fiction” (S2P1-S2P2). The passages also give historical origin context, but that does not rescue the claim.
Verdict confidence: 96/100. Direct excerpts explicitly reject the 10% claim as unsupported/fiction and provide decisive bases: no redundant brain part, no entirely silent zone, and scans showing all regions are used over time [S1P1, S1P2, S1P3, S2P1, S2P2]. Method: verdict-evidence-v1. Not a calibrated probability.