In pragmatics, an implicature is a meaning that hearer or reader infers from an utterance in its communicative context, although that meaning is not explicitly stated and is not part of the expression’s conventional semantic content ^[1][2]. The inference arises from the assumption that the speaker’s contribution is interpretable in relation to the purposes of the exchange, contextual information, and expectations governing communication ^[1]. Conversational implicatures are derived pragmatically from these circumstances and are generally defeasible: they may be cancelled without logical contradiction when a speaker explicitly rejects the inferred meaning ^[1][3]. By contrast, conventional implicatures are associated with particular linguistic expressions and contribute additional meaning independently of the truth conditions of the proposition expressed ^[1][4]. Implicature is distinct from entailment, because an entailed proposition must be true if the utterance is true, whereas an implicature need not be; it is also distinct from presupposition, which concerns information treated as already accepted or taken for granted in discourse ^[2][3].