| compos mentis | Of sound mind; usually used in its opposite form, non compos mentis. Origin: L. Possessed of one's mind; compos, having control, + mens(ment-), mind (05 Mar 2000) |
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| non compos mentis | Not of sound mind; mentally incapable of managing one's affairs. Origin: L. Non, not, + compos, participating, competent, + mens, gen. Mentis, mind (05 Mar 2000) |
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