However, where there is a clear contractual liability, the presumption is rebutted. In Merritt/Merritt, a separation agreement between insane spouses was enforceable. At Beswick v. Beswick, an uncle`s agreement to sell a coal delivery to his nephew was enforceable. Even at Errington v. Errington, a father`s promise to his son and daughter-in-law to live in a house (and ultimately own) if they had paid the rest of the mortgage was a one-sided contract enforceable. Whether they are not legally binding is another question. In commercial cases, the courts do not readily accept that a company accepts an agreement that it considers unfair or that it includes inappropriate conditions. This agreement did not enter into force as a formal or legal agreement, and this memorandum is not written, and it is not subject to jurisdiction before the courts of the United States or England, but it is merely a concrete expression and a trace of the objective and intent of the three parties involved, to which they undertake, honourably, with confidence, on the basis of past cases, that they are of each of the three parties with mutual loyalty and friendly cooperation. It does not depend on their subjective state of mind, but on the examination of what has been communicated between them by words or behaviours, and whether this objectively leads to the conclusion that they intended to establish legal relations and had agreed on all the conditions they considered essential to establishing legally binding relationships.