In this paper, I argue that the distinction between standard and non-standard pragmatic implications, originally used to differentiate among types of conversational implicatures, applies to the family of contents—traditionally referred to as ‘presuppositions’—that exhibit projective behaviour. Following the scholars working within the Question Under Discussion model of communication, I distinguish between two types of projective implications: suppositions and presuppositions narrowly construed. Next, I identify two rules of appropriateness that govern the use of, respectively, supposition-triggering and presupposition-triggering expressions. Finally, I argue that the ostentatious violation of the rules in question gives rise to non-standard projective implications, whereas their observance results in standard suppositions and presuppositions; I also use the idea of discourse coherence to develop a sketchy account of the mechanisms underlying the functioning of non-standard projective implications.

在本文中，我认为，标准的和非标准的语用含义之间的区别最初用于区分会话含义的类型，适用于表现射影行为的内容系列（传统上称为“预设”）。跟随学者在讨论中的“讨论中的问题”沟通模式下工作，我区分了两种类型的投射含义：狭义的假设和预设。接下来，我确定两个适当性规则，分别控制假设触发表达式和预设触发表达式的使用。最后，我认为表面上违反规则的行为引起了非标准的投射含义，而对它们的遵守导致了标准的假设和预设。