“…For instance, in uttering (11c), speaker B performs a direct act of making a presumption that not only shifts the burden of proof among the participants in the dialogue, but also invites speaker A either to endorse the proposition that C is honest or to refuse to endorse it and, next, justify his refusal. In other words, the response that B's utterance invites by convention qua a felicitous presumption-where 'by convention' is to be read as 'in accordance with a relevant pattern of verbal interaction' (see Witek 2015aWitek , 2019b-is either A's endorsement of the proposition in question or his refusal to do so followed by an appropriate justification, e.g., A's utterances of (11d) and (11e), respectively. In general, the proponent's successful individual presumption that p (e 2 ) creates the obligation on the part of the respondent to justify his refusal to endorse the proposition that p, whenever he refuses to endorse it, and, at the same time, (e 3 ) invites him to complete one of the conversational sequences: "the proponent's presumption that p followed by the respondent's endorsement of the proposition that p" or "the proponent's presumption that p followed by the respondent's refusal to endorse the proposition that p and his justification of this refusal.…”