 But there are clear situations where the evidence which formed the basis for the assignment of perjury is clearly unconnected to the main issue in dispute.In that case the materiality requirement as a criterion for culpability is then justified.In the case of Omoregie v D.P.P, three assignments were made against the accused (appellant) in a civil case and, the question arose as to whether those assignments were material to main issue in dispute, and whether the appellant made the false statements knowingly.