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<Paper uid="E93-1048">
  <Title>DELIMITEDNESS AND TRAJECTORY-OF-MOTION EVENTS *</Title>
  <Section position="8" start_page="419" end_page="419" type="concl">
    <SectionTitle>
5 Conclusion
</SectionTitle>
    <Paragraph position="0"> In this paper I have presented a novel, sortally-based approach to the problem of aspectual composition which I have argued to be superior on both empirical and computational grounds to previous approaches relying on referential homogeneity tests. I have also described an implemented system based on the theoretical treatment which determines whether a specified sequence of trajectory-of-motion events is or is not possible under varying situationally specified constraints.</Paragraph>
    <Paragraph position="1"> Beyond its obvious shortcomings, there are three specific limitations to the system worth mentioning.</Paragraph>
    <Paragraph position="2"> First, the range of discourses is limited to narrative sequences, which greatly simplifies the necessary reasoning (el. Hwang and Schubert, 1991, Lascarides and Asher, 1991, Hobbs et. el. 1993). Second, the present approach does not lend itself well to flexibly accommodating new information. Third, in the case where a specified sequence of events turns out not to be possible, the constraint satisfaction approach does not provide any mechanism for explaining why this happens to be so. In order to address these problems, in future work I intend to investigate to what extent the present approach can be meshed with the Interpretation as Abduction approach advocated by Hobbs et. al., which appears to be well suited to these issues.</Paragraph>
  </Section>
class="xml-element"></Paper>