The capacity or tendency to make mistakes or be wrong; the quality of being fallible.
From Latin 'fallibilis' (capable of erring) from 'fallere' (to deceive) plus '-ibility' (the quality of being). This noun form emerged in medieval philosophy and theology.
The entire scientific method is built on accepting human fallibility—we design experiments to catch our own mistakes because we *know* our brains fool us constantly, which is basically admitting our senses lie and then building machines to fact-check reality.
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