 On such an approach, the satisfaction of a presupposition is an admittance condition of an assertion (cf. Karttunen 1974; Heim 1988). This idea connects with Austin’s more general idea of felicity conditions of speech  acts.[14]  Does Stalnaker offer an account of assertion itself? The answer is no, for the role of assertion is shared by other speech acts such as assuming and conjecturing (Stalnaker 1978: 153). What is added to the common ground is only for the purpose of conversation, and need not be actually believed by the participants. It is only required that it be accepted (cf. Stalnaker 2002: 716).