M'Naghten rule

[mik-naw´ton] a definition of criminal responsibility formulated in 1843 by English judges questioned by the House of Lords as a result of the acquittal of Daniel M' Naghten on grounds of insanity. It holds that “to establish a defense on the ground of insanity, it must be clearly proved that, at the time of committing the act, the party accused was laboring under such a defect of reason, from disease of the mind, as not to know the nature and quality of the act he was doing, or, if he did know it, he did not know he was doing what was wrong” and further that a defendant who “labors under partial delusions only and is not in other respects insane… must be considered in the same situation as to responsibility as if the facts with respect to which the delusion exists were real.” These rules are still used in many American jurisdictions.

M'Nagh·ten rule

(mik-naw'tĕn), the classic English test of criminal responsibility (1843): "to establish a defense on the ground of insanity, it must be clearly proved that, at the time of committing the act, the party accused was laboring under such a defect of reasoning, from disease of the mind, as not to know the nature and quality of the act he was doing, or if he did know it, that he did not know he was doing what was wrong."

M'Nagh·ten rule

(mik-naw'tĕn rūl) The classic English test of criminal responsibility (1843): "to establish a defense on the ground of insanity, it must be clearly proved that, at the time of committing the act, the party accused was laboring under such a defect of reasoning, from disease of the mind, as not to know the nature and quality of the act he was doing, or if he did know it, that he did not know he was doing what was wrong."

M'Naghten,

Daniel, English criminal, tried in March, 1843. M'Naghten rule - the classic English test of criminal responsibility.

M'Naghten Rule

A test applied to determine whether a person accused of a crime was sane at the time of its commission and, therefore, criminally responsible for the wrongdoing.

The M'Naghten rule is a test for criminal insanity. Under the M'Naghten rule, a criminal defendant is not guilty by reason of insanity if, at the time of the alleged criminal act, the defendant was so deranged that she did not know the nature or quality of her actions or, if she knew the nature and quality of her actions, she was so deranged that she did not know that what she was doing was wrong.

The M'Naghten rule on criminal insanity is named for Daniel M'Naghten, who, in 1843, tried to kill England's prime minister Sir Robert Peel. M'Naghten thought Peel wanted to kill him, so he tried to shoot Peel but instead shot and killed Peel's secretary, Edward Drummond. Medical experts testified that M'Naghten was psychotic, and M'Naghten was found not guilty by reason of insanity.

The public chafed at the verdict, and the House of Lords in Parliament ordered the Lords of Justice of the Queen's Bench to fashion a strict definition of criminal insanity. The Lords of Justice complied and declared that insanity was a defense to criminal charges only if

at the time of the committing of the act, the party accused was labouring under such a defect of reason, from a disease of the mind, as not to know the nature and quality of the act he was doing; or, if he did know it, that he did not know he was doing what was wrong. (Queen v. M'Naghten, 8 Eng. Rep. 718 [1843])

The aim of the M'Naghten rule was to limit the Insanity Defense to cognitive insanity, a basic inability to distinguish right from wrong. Other tests formulated by legislatures and courts since M'Naghten have supplemented the M'Naghten rule with another form of insanity called volitional insanity. Volitional insanity is experienced by mentally healthy persons who, although they know what they are doing is wrong, are so mentally unbalanced at the time of the criminal act that they are unable to conform their actions to the law. The M'Naghten rule was adopted in most jurisdictions in the United States, but legislatures and courts eventually modified and expanded the definition. The definition of criminal insanity now varies from jurisdiction to jurisdiction, but most of them have been influenced by the M'Naghten rule.

Many jurisdictions reject volitional insanity but retain cognitive insanity with a minor variation on the M'Naghten definition. Under the M'Naghten rule, a person was legally insane if she was so deranged that she did not know what she was doing. Under many current statutes, a person is legally insane if she is so deranged that she lacks substantial capacity to appreciate the criminality of her conduct.

The difference between the two definitions is largely theoretical. In theory, the latter definition is more lenient because it requires only that a person lack substantial capacity to appreciate her conduct.

Cross-references

Durham Rule; Insanity Defense.

单词	m'naghten rule
释义	DictionarySeerule M'Naghten rule M'Naghten rule [mik-naw´ton] a definition of criminal responsibility formulated in 1843 by English judges questioned by the House of Lords as a result of the acquittal of Daniel M' Naghten on grounds of insanity. It holds that “to establish a defense on the ground of insanity, it must be clearly proved that, at the time of committing the act, the party accused was laboring under such a defect of reason, from disease of the mind, as not to know the nature and quality of the act he was doing, or, if he did know it, he did not know he was doing what was wrong” and further that a defendant who “labors under partial delusions only and is not in other respects insane… must be considered in the same situation as to responsibility as if the facts with respect to which the delusion exists were real.” These rules are still used in many American jurisdictions. M'Nagh·ten rule (mik-naw'tĕn), the classic English test of criminal responsibility (1843): "to establish a defense on the ground of insanity, it must be clearly proved that, at the time of committing the act, the party accused was laboring under such a defect of reasoning, from disease of the mind, as not to know the nature and quality of the act he was doing, or if he did know it, that he did not know he was doing what was wrong." M'Nagh·ten rule (mik-naw'tĕn rūl) The classic English test of criminal responsibility (1843): "to establish a defense on the ground of insanity, it must be clearly proved that, at the time of committing the act, the party accused was laboring under such a defect of reasoning, from disease of the mind, as not to know the nature and quality of the act he was doing, or if he did know it, that he did not know he was doing what was wrong." M'Naghten, Daniel, English criminal, tried in March, 1843. M'Naghten rule - the classic English test of criminal responsibility. M'Naghten Rule M'Naghten Rule A test applied to determine whether a person accused of a crime was sane at the time of its commission and, therefore, criminally responsible for the wrongdoing. The M'Naghten rule is a test for criminal insanity. Under the M'Naghten rule, a criminal defendant is not guilty by reason of insanity if, at the time of the alleged criminal act, the defendant was so deranged that she did not know the nature or quality of her actions or, if she knew the nature and quality of her actions, she was so deranged that she did not know that what she was doing was wrong. The M'Naghten rule on criminal insanity is named for Daniel M'Naghten, who, in 1843, tried to kill England's prime minister Sir Robert Peel. M'Naghten thought Peel wanted to kill him, so he tried to shoot Peel but instead shot and killed Peel's secretary, Edward Drummond. Medical experts testified that M'Naghten was psychotic, and M'Naghten was found not guilty by reason of insanity. The public chafed at the verdict, and the House of Lords in Parliament ordered the Lords of Justice of the Queen's Bench to fashion a strict definition of criminal insanity. The Lords of Justice complied and declared that insanity was a defense to criminal charges only if at the time of the committing of the act, the party accused was labouring under such a defect of reason, from a disease of the mind, as not to know the nature and quality of the act he was doing; or, if he did know it, that he did not know he was doing what was wrong. (Queen v. M'Naghten, 8 Eng. Rep. 718 [1843]) The aim of the M'Naghten rule was to limit the Insanity Defense to cognitive insanity, a basic inability to distinguish right from wrong. Other tests formulated by legislatures and courts since M'Naghten have supplemented the M'Naghten rule with another form of insanity called volitional insanity. Volitional insanity is experienced by mentally healthy persons who, although they know what they are doing is wrong, are so mentally unbalanced at the time of the criminal act that they are unable to conform their actions to the law. The M'Naghten rule was adopted in most jurisdictions in the United States, but legislatures and courts eventually modified and expanded the definition. The definition of criminal insanity now varies from jurisdiction to jurisdiction, but most of them have been influenced by the M'Naghten rule. Many jurisdictions reject volitional insanity but retain cognitive insanity with a minor variation on the M'Naghten definition. Under the M'Naghten rule, a person was legally insane if she was so deranged that she did not know what she was doing. Under many current statutes, a person is legally insane if she is so deranged that she lacks substantial capacity to appreciate the criminality of her conduct. The difference between the two definitions is largely theoretical. In theory, the latter definition is more lenient because it requires only that a person lack substantial capacity to appreciate her conduct. Further readings Kaplan, John, and Robert Weisberg. 1991. Criminal Law: Cases and Materials. 2d ed. Boston: Little, Brown. Cross-references Durham Rule; Insanity Defense.
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M'Naghten rule

M'Naghten rule

M'Nagh·ten rule

M'Nagh·ten rule

M'Naghten,

M'Naghten Rule

M'Naghten Rule

Further readings

Cross-references