In order for a defendant in a criminal trial to be found not guilty by virtue of insanity under the M'Naghten rule, what must the defense demonstrate?

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The M'Naghten rule requires the defense to demonstrate that the defendant was so disordered that he or she did not realize the act was a crime. This means that the defendant did not understand the nature and quality of the act, or that it was wrong. Simply suffering from a brain disorder or committing an act that seems abnormal to others is not sufficient to meet the criteria for insanity under M'Naghten.

In Order for a Defendant in a Criminal Trial to Be