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irresistible impulse test n: a test used in some jurisdictions when considering an insanity defense that involves a determination of whether an impulse to commit a criminal act was irresistible due to mental disease or defect regardless of whether the defendant knew right from wrong compare diminished capacity, durham rule, m'naghten test, substantial capacity test
Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.