Non compos mentis

Non compos mentis is a Latin legal phrase that translates to "of unsound mind": nōn ("not") prefaces compos mentis, meaning "having control of one's mind." This phrase was used in English law as early as the seventeenth century to describe people afflicted by madness, the loss of memory or ability to reason.[1]

  1. ^ "Non Compos Mentis". Oxford English Dictionary. Retrieved 2016-11-15.

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