linguistic:translation
Offer, acceptance, and invitation to treat

Where something is advertised in a newspaper or on a poster, the advertisement will not normally constitute an offer but will instead be an invitation to treat, an indication that one or both parties are prepared to negotiate a deal. An exception arises if the advertisement makes a unilateral promise, such as the offer of a reward, as in the case of Carlill v Carbolic Smoke Ball Co, decided in nineteenth-century England. The company, a pharmaceutical manufacturer, advertised a smoke ball that would, if sniffed "three times daily for two weeks", prevent users from catching the flu. If it failed to do so, the company promised to pay the user £ 100, adding that they had "deposited £1,000 in the Alliance Bank to show sincerity in the matter". When the company was sued for the money, they argued the advert should not have been taken as a serious, legally binding offer but a puff. The Court of Appeal held that it would appear to a reasonable man that Carbolic had made a serious offer and determined that the reward was a contractual promise.