M'Naghten rule

{
  "id": "MLC-T-LAW-003270",
  "term": "M'Naghten rule",
  "field": "Law",
  "definition": "A legal test for criminal insanity, originating from an 1843 English case, which states that a defendant is not guilty by reason of insanity if, at the time of committing the act, they were laboring under such a defect of reason, from disease of the mind, as not to know the nature and quality of the act they were doing, or if they did know it, that they did not know what they were doing was wrong. This rule is one of the most widely used standards for the insanity defense in common law jurisdictions.",
  "url": "https://mlchart.com/terminology/law/m-naghten-rule/"
}