Which standard of the insanity defense excuses a person who was so ill at the time of the crime that they could not use reason to tell right from wrong?

Question

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The M'Naghten rule states that a defendant is not guilty by reason of insanity if, at the time of the crime, they were suffering from a severe mental illness that either prevented them from understanding the nature and quality of their actions or from knowing right from wrong.

Which Standard of the Insanity Defense Excuses a Person Who