INSANE

insane,adj. Mentally deranged; suffering from one or more delusions or false beliefs that (1) have no foundation in reason or reality, (2) are not credible to any reasonable person of sound mind, and (3) cannot be overcome in a sufferer’s mind by any amount of evidence or argument. See INSANITY. [Cases: Mental Health 3. C.J.S. Insane Persons§§ 2, 6.]

[Blacks Law 8th]