hex0D passes along an article at NPR about a study that examined the biology behind the self-assessment of knowledge. Quoting: "We isolated a region of the prefrontal cortex, which is right at the front of the brain and is thought to be involved in high-level thought, conscious planning, monitoring of our ongoing brain activity,' Fleming says. In people who were good at assessing their own level of certainty, that region had more gray matter and more connections to other parts of the brain, according to the study Fleming and his colleagues published in the journal Science."
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