The binding legal principles established are: (1) Sections 26, 29, and 30 of the Insolvency Act 24 of 1936 create different causes of action with different essential elements, such that reliance on one section in previous proceedings does not create res judicata barring reliance on another section in subsequent proceedings. (2) For issue estoppel to succeed as a defence, it must nullify the entire legal force of the cause of action; if the plaintiff retains a viable cause of action on other grounds notwithstanding the estoppel on one issue, the defence fails. (3) The 'once and for all' rule (Henderson v Henderson principle) is based on abuse of process and requires the party relying on it to plead and prove facts demonstrating abuse; it should only be applied when the facts amount to an abuse of process, having regard to considerations of equity and fairness. (4) Lis alibi pendens is a discretionary remedy that requires balancing the interests of affected parties, taking into account factors such as the effectiveness of alternative procedures, convenience, cost, and practical considerations. (5) Each case involving extended application of res judicata principles must be decided on its own facts, with careful scrutiny to avoid injustice.