Having a healthy and rational mind; mentally sound and capable of reasonable judgment. Can also mean sensible and practical in approach or decision-making.
From Latin 'sanus' meaning healthy or sound, related to physical and mental wellbeing. The focus on mental health specifically developed in English by the 17th century as understanding of psychology evolved.
The legal definition of sanity varies dramatically across cultures and time periods, with what was once considered divine inspiration sometimes later classified as mental illness. The phrase 'sane person' in legal contexts often means someone who can distinguish right from wrong, a surprisingly complex philosophical question.
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