ABSTRACT
Aspeakercanbesaidtoaffirmapropositioninthediscoursewhens/heexplicitly
commitshim/herselftothetruthofthatproposition.Theevokedpmaybeoneoftwo
types:
·•onewhichisnotsemanticallyentailedorpresupposedbyz-l(asin377 through379);
•onewhichthespeakerbelievesiscontrarytoexpectationordoubtful(asin 380through382).
