According to the ‘grammatical account’, scalar implicatures are triggered by a covert exhaustification operator present in logical form. This account covers considerable empirical ground, but there is a peculiar pattern that resists treatment given its usual implementation. The pattern centers on odd assertions like #Most lions are mammals and #Some Italians come from a beautiful country, which seem to trigger implicatures in contexts where the enriched readings conflict with information in the common ground. Magri (Nat Language Semant 17(3):245–297. https://doi.org/10.1007/s11050-009-9042-x, 2009; Semant Pragmat 4(6):1–51. https://doi.org/10.3765/sp.4.6, 2011) argues that, to account for these cases, the basic grammatical approach has to be supplemented with the stipulations that exhaustification is obligatory and is based on formal computations which are blind to information in the common ground. In this paper, I argue that accounts of oddness should allow for the possibility of felicitous assertions that call for revision of the common ground, including explicit assertions of unusual beliefs such as Most but not all lions are mammals and Some but not all Italians come from Italy. To adequately cover these and similar cases, I propose that Magri’s version of the Grammatical account should be refined with the novel hypothesis that exhaustification triggers a bifurcation between presupposed (the negated relevant alternatives) and at-issue (the prejacent) content. The explanation of the full oddness pattern, including cases of felicitous proposals to revise the common ground, follows from the interaction between presupposed and at-issue content with an independently motivated constraint on accommodation. Finally, I argue that treating the exhaustification operator as a presupposition trigger helps solve various independent puzzles faced by extant grammatical accounts, and motivates a substantial revision of standard accounts of the overt exhaustifier only.

根据“语法说明”，标量含义由逻辑形式存在的隐式穷举运算符触发。该说明涵盖了相当多的经验基础，但是鉴于其通常的实现方式，存在一个独特的模式可以抵制治疗。这种模式以奇怪的断言为中心，例如＃大多数狮子是哺乳动物，并且＃一些意大利人来自美丽的国家，这似乎会在丰富的阅读内容与共同点上的信息冲突的情况下引发暗示。Magri（Nat语言Semant 17（3）：245-297。https://doi.org/10.1007/s11050-009-9042-x，2009; Semant Pragmat 4（6）：1-51。https：// doi .org / 10.3765 / sp.4.6，2011年）认为，为解决这些情况，必须在基本语法方法的基础上补充规定：穷举是强制性的，并且基于对共同点信息无知的正式计算。在本文中，我认为，对奇数的解释应考虑到可能提出要求修改共同立场的断言的可能性，包括对不寻常信念的明确断言，例如大多数但并非所有狮子都是哺乳动物，一些但并非全部意大利人来自意大利。为了充分涵盖这些和类似的情况，我建议应以新颖的假设完善Magri的“语法”说明，即用尽会触发预设（否定的相关替代方案）与原始内容（临近）之间的分歧。对完全怪异模式的解释，包括修改共同立场的有益提议的案例，来自预设内容和问题内容之间的相互作用，以及对适应性的独立动机约束。最后，我认为将穷举运算符作为预设触发因素有助于解决现存的语法说明所面临的各种独立难题，并促使对显性穷举符的标准说明进行实质性修订只。