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in court when someone was not aware of right and wrong at the time he or she committed a crime -Apex
it was a mark of insanity
No, insanity is the antonym of sanity.
See Answers.com page for insanity: http://www.answers.com/topic/quote-4?subject=Insanity&s2=Insanity
Insanity Radio was created in 1998.