“…Accordingly, a speaker who asserts either of (1) or (2) is committed to the truth of (3a) and (3b) (Grice, 1975;Williamson, 1996). If the hearer trusts the speaker, he or she will also accept (3a) and (3b), and this information will then become shared knowledge, or common ground, between them for the remainder of the discourse, where the common ground is the set of assumptions taken for granted in the conversation by speaker and hearer (Clark, 1996;Clark & Marshall, 1981;Heim, 1983a;Karttunen, 1974;Lewis, 1969;Stalnaker, 1974Stalnaker, , 1978Stalnaker, , 1998Stalnaker, , 2002.…”