competency

noun | \ ˈkäm-pə-tən-sē \ | com·pe·ten·cy

1. : the quality or state of being mentally competent — compare capacity, incompetence, insanity

2. : the quality or state of being legally qualified or adequate the competency, quantum and legal effect of evidence —State v. Scoggin, 72 S.E.2d 54 (1952)