Section 98(4) of the Criminal Law (Codification and Reform) Act, which prohibits courts from taking judicial notice of practices commonly associated with witchcraft without expert evidence, does not preclude conviction based on an accused person's admission of facts. What is admitted need not be proved, and an admission constitutes sufficient evidence of the admitted fact under section 314 of the Criminal Procedure and Evidence Act. Section 271(1) of the Criminal Procedure and Evidence Act permits conviction on a plea of guilty without hearing evidence, except in murder cases. Where an accused unequivocally pleads guilty and admits all essential elements of an offence, including that the conduct amounts to a practice commonly associated with witchcraft, the court may convict without expert evidence as the admission itself constitutes proof of the accused's mental state and commission of the prohibited conduct.