This book offers a new approach to the representation of meaning of temporally-located utterances and discourses. Temporality, the author suggests, should be taken to mean degrees of certainty, understood in turn as degrees of acceptability concerning the eventuality referred to in the speaker's utterance. - ;Thinking and speaking about time is ridden with puzzles and paradoxes. How do human beings conceptualize time? Why, for example, does the availability of tense vary in different languages? How do the lines of information from tense, aspect, temporal adverbs, and context interact in the mi