数学

（1）有理，应支付。（2）可以，只要有明确的受约束的意思表示即可。
“天不想亮”你懂不懂啊？这是英国法判例上大名鼎鼎的薰剂案！
Carlill Vs. Carbolic smoke ball
The Full decision of the case
APPEAL from a decision of Hawkins, J.(2)

The defendants, who were the proprietors and vendors of a medical preparation called "The Carbolic Smoke Ball," inserted in the Pall Mall Gazette of November 13, 1891, and in other newspapers, the following advertisement: "100 reward will be paid by the Carbolic Smoke Ball Company to any person who contracts the increasing epidemic influenza, colds, or any disease caused by taking cold, after having used the ball three times daily for two weeks according to the printed directions supplied with each ball. 1000 is deposited with the Alliance Bank, Regent Street, shewing our sincerity in the matter.

"During the last epidemic of influenza many thousand carbolic smoke balls were sold as preventives against this disease, and in no ascertained case was the disease contracted by those using the carbolic smoke ball.

"One carbolic smoke ball will last a family several months, making it the cheapest remedy in the world at the price, 10, post free. The ball can be refilled at a cost of 5 Address, Carbolic Smoke Ball Company, 27, Princes Street, Hanover Square, London."

The plaintiff, a lady, on the faith of this advertisement, bought one of the balls at a chemist’s, and used it as directed, three times a day, from November 20, 1891, to January 17, 1892, when she was attacked by influenza. Hawkins, J., held that she was entitled to recover the 100 The defendants appealed.

Finlay, Q.C., and T. Terrell, for the defendants. The facts shew that there was no binding contract ween the parties. The case is not like Williams v. Carwardine (4 B. Ad. 621), where the money was to become payable on the performance of certain acts by the plaintiff; here the plaintiff could not by any act of her own establish a claim, for, to establish her right to the money, it was necessary that she should be attacked by influenza - an event over which she had no control. The words express an intention, but do not amount to a promise: Week v. Tibold. 1 Roll. Abr. 6 (M.). The present case is similar to Harris v. Nickerson. Law Rep. 8 Q. B. 286. The advertisement is too vague to be the basis of a contract; there is no limit as to time, and no means of checking the use of the ball. Anyone who had influenza might come forward and depose that he had used the ball for a fortnight, and it would be impossible to disprove it. Guthing v. Lynn 2 B. Ad. 232 supports the view that the terms are too vague to make a contract, there being no limit as to time, a person might claim who took the influenza ten years after using the remedy. There is no consideration moving from the plaintiff: Gerhard v. Bates 2 E. B. 476. The present case differs from Denton v. Great Northern Ry. Co. 5 E. B. 860, for there an overt act was done by the plaintiff on the faith of a statement by the defendants. In order to make a contract by fulfilment of a condition, there must either be a communication of intention to accept the offer, or there must be the performance of some overt act. The mere doing an act in private will not be enough. This principle was laid down by Lord Blackburn in Brogden v. Metropolitan Ry. Co. 2 App. Cas. 666. The terms of the advertisement would enable a person who stole the balls to claim the reward, though his using them was no possible benefit to the defendants. At all events, the advertisement should be held to apply only to persons who bought directly from the defendants. But, if there be a contract at all, it is a wagering contract, as being one where the liability depends on an event beyond the control of the parties, and which is therefore void under 8 9 Vict. c. 109. Or, if not, it is bad under 14 Geo. 3, c. 48, s. 2, as being a policy of insurance on the happening of an uncertain event, and not conforming with the provisions of that section.

Dickens, Q.C., and W. B. Allen, for the plaintiff. [THE COURT intimated that they required no argument as to the question whether the contract was a wager or a policy of insurance.] The advertisement clearly was an offer by the defendants; it was published that it might be read and acted on, and they cannot be heard to say that it was an empty boast, which they were under no obligation to fulfil. The offer was duly accepted. An advertisement was addressed to all the public - as soon as a person does the act mentioned, there is a contract with him. It is said that there must be a communication of the acceptance; but the language of Lord Blackburn, in Brogden v. Metropolitan Ry. Co. 2 App. Cas. 666, shews that merely doing the acts indicated is an acceptance of the proposal. It never was intended that a person proposing to use the smoke ball should go to the office and obtain a repetition of the statements in the advertisement. The defendants are endeavouring to introduce words into the advertisement to the effect that the use of the preparation must be with their privity or under their superintendence. Where an offer is made to all the world, nothing can be imported beyond the fulfilment of the conditions. Notice before the event cannot be required; the advertisement is an offer made to any person who fulfils the condition, as is explained in Spencer v. Harding Law Rep. 5 C. P. 561. Williams v. Carwardine 4 B. Ad. 621 shews strongly that notice to the person making the offer is not necessary. The promise is to the person who does an act, not to the person who says he is going to do it and then does it. As to notice after the event, it could have no effect, and the present case is within the language of Lord Blackburn in Brogden v. Metropolitan Ry. Co. 2 App. Cas. 666. It is urged that the terms are too vague and uncertain to make a contract; but, as regards parties, there is no more uncertainty than in all other cases of this description. It is said, too, that the promise might apply to a person who stole any one of the balls. But it is clear that only a person who lawfully acquired the preparation could claim the benefit of the advertisement. It is also urged that the terms should be held to apply only to persons who bought directly from the defendants; but that is not the import of the words, and there is no reason for implying such a limitation, an increased sale being a benefit to the defendants, though effected through a middleman, and the use of the balls must be presumed to serve as an advertisement and increase the sale. As to the want of restriction as to time, there are several possible constructions of the terms; they may mean that, after you have used it for a fortnight, you will be safe so long as you go on using it, or that you will be safe during the prevalence of the epidemic. Or the true view may be that a fortnight’s use will make a person safe for a reasonable time.

Then as to the consideration. In Gerhard v. Bates 2 E. B. 476, Lord Campbell never meant to say that if there was a direct invitation to take shares, and shares were taken on the faith of it, there was no consideration. The decision went on the form of the declaration, which did not state that the contract extended to future holders. The decision that there was no consideration was qualified by the words "as ween these parties," the plaintiff not having alleged himself to be a member of the class to whom the promise was made.

Finlay, Q.C., in reply. There is no binding contract. The money is payable on a person’s taking influenza after having used the ball for a fortnight, and the language would apply just as well to a person who had used it for a fortnight before the advertisement as to a person who used it on the faith of the advertisement. The advertisement is merely an expression of intention to pay 100 to a person who fulfils two conditions; but it is not a request to do anything, and there is no more consideration in using the ball than in contracting the influenza. That a contract should be completed by a private act is against the language of Lord Blackburn in Brogden v. Metropolitan Ry. Co. 2 App. Cas. 692. The use of the ball at home stands on the same level as the writing a letter which is kept in the writer’s drawer. In Denton v. Great Northern Ry. Co. 5 E. B. 860 the fact was ascertained by a public, not a secret act. The respondent relies on Williams v. Carwardine 4 B. Ad. 621, and the other cases of that class; but there a service was done to the advertiser. Here no service to the defendants was requested, for it was no benefit to them that the balls should be used: their interest was only that they should be sold. Those cases also differ from the present in this important particular, that in them the service was one which could only be performed by a limited number of persons, so there was no difficulty in ascertaining with whom the contract was made. It is said the advertisement was not a legal contract, but a promise in honour, which, if the defendants had been approached in a proper way, they would have fulfilled. A request is as necessary in the case of an executed consideration as of an executory one:

Lampleigh v. Braithwait 1 Sm. L. C. 9th ed. pp. 153, 157, 159; and here there was no request. Then as to the want of limitation as to time, it is conceded that the defendants cannot have meant to contract without some limit, and three limitations have been suggested. The limitation "during the prevalence of the epidemic" is inadmissible, for the advertisement applies to colds as well as influenza. The limitation "during use" is excluded by the language "after having used." The third is, "within a reasonable time," and that is probably what was intended; but it cannot be deduced from the words; so the fair result is that there was no legal contract at all.

看不懂？我给你大致讲一下。法官是这么说的，虽然说广告是对不特定人提出的，一般情况下属于要约邀请（ITT），但是本案中，被告不仅将悬赏内容写得十分具体，而且已经把1000英镑存进银行，充分显示出它愿意受到该广告内容的约束（to be bound）,所以符合了要约的根本特征，即受约束的意思表示。所以，本案中的广告是一个要约。而原告通过并使用薰剂的行为作出了行为承诺。有要约，有承诺，这个合同就成立了。
英美法教材用这个案例来说明，要约不一定要向特定人发出，只要有明确的受约束的意思表示即可。
打字不易，如满意，望采纳。