As Lord Wright pointed out in Heyman v. Darwins Ltd. [2] , repudiation is an ambiguous word and is used in various senses. We are of course concerned only with a case in which it is admitted that there was a valid and binding contract. Such a contract may be repudiated if one party renounces his liabilities under it - if he evinces an intention no longer to be bound by the contract (Freeth v. Burr [3] ) or shows that he intends to fulfil the contract only in a manner substantially inconsistent with his obligations and not in any other way (Ross T. Smyth & Co. Ltd. v. T. D. Bailey, Son & Co. [4] ; Carr v. J. A. Berriman Pty. Ltd. [5] ). In such a case the innocent party is entitled to accept the repudiation, thereby discharging himself from further performance, and sue for damages: Heyman v. Darwins Ltd. [6] . It is convenient to say that the injured party in these circumstances rescinds the contract, although there is, of course, no rescission ab initio: Johnson v. Agnew [7] . The present case was not one of this kind. There is nothing to suggest that the lessee had any intention other than to fulfil the contract, according to its terms, to the best of its ability. However, if one party, although wishing to perform the contract, proves himself unable to do so, his default in performance will give the other party a right to rescind the contract, if the breach goes "so much to the root of the contract that it makes further commercial performance of the contract impossible": Hongkong Fir Shipping Co. Ltd. v. Kawasaki Kisen Kaisha Ltd. [8] . There is high authority for treating such cases as a form of repudiation of the contract: Suisse Atlantique Société d'Armement Maritime S.A. v. N.V. Rotterdamsche Kolen Centrale [9] ; Federal Commerce v. Molena Alpha [10] . In Honner v. Ashton [11] , Mahoney J.A. said that he thought that the right to terminate for fundamental breach should be seen as, in principle, distinct from the right to terminate for repudiation. For present purposes, it is immaterial whether repudiation and fundamental breach are treated as separate categories, for in either case the innocent party can rescind the contract and recover damages to compensate him for the failure to perform the contractual obligations. Counsel for the respondent, in their alternative argument, sought to bring the case within this principle. A third situation in which a right to rescission arises is where there has been a breach of a fundamental or essential term of the contract. In Suisse Atlantique Société d'Armement Maritime S.A. v. N.V. Rotterdamsche Kolen Centrale [12] , Lord Upjohn said: