广告的作用主要在于引起公众的注意和兴趣,从而达到促销的目的。但是产品与其广告是否名副其实,日益引起了消费者的关注。本文从逻辑的角度对不同句式的广告语预设做了分析并用求取合取范式的方法论证其逻辑模式为永真式,以期进一步阐释广告语是如何利用预设来向受众传达其真实性和可信性的。 The role of advertising is mainly to attract public attention and interest, so as to achieve the purpose of promotion. But whether products and their advertisements are worthy of the name is increasingly attracting the attention of consumers. This article analyzes the presuppositions of different slogans from a logical point of view and argues that the logical model is always true by using the method of conjunctive paradigm, in order to further explain how slogans use presuppositions to communicate their truth to the audience. Sex and credibility.