The decision of the appellant whether to give or not give evidence will be a consideration when assessing whether those hypotheses are rational or reasonable, if the facts to which he might speak are peculiarly within his knowledge: Azzopardi v The Queen [2001] HCA 25; (2001) 205 CLR 50 at [64]; Weissensteiner v The Queen [1993] HCA 65; (1993) 178 CLR 217 at [227].