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<Paper uid="E89-1023">
  <Title>ENHANCING EXPLANATION COHERENCE WITH RHETORICAL STRATEGIES</Title>
  <Section position="3" start_page="0" end_page="0" type="intro">
    <SectionTitle>
INTRODUCTION
</SectionTitle>
    <Paragraph position="0"> Recent work in text generation includes emphasis on producing textual presentations of the explanations of reasoning in knowledge-based systems. Initial work (Swartout, 1981) on the direct translation of underlying system knowledge led to insights that more perspicuous justifications would result from keeping track of the principles or deep causal models which supported that knowledge (Swartout and Smoliar, 1988).</Paragraph>
    <Paragraph position="1"> And experiments with discourse strategies demonstrated the efficacy of the rhetorical organization of knowledge to produce descriptions, comparisons (McKeown, 1985) and clarification (McCoy, 1985). Researchers have recently observed (Paris et al, 1988) that the line of explanation should not isomorphically mirror the underlying line of reasoning as this often resulted in poorly connected text (Appelt, 1982). Others have attempted to classify patterns of explanations (Stevens and Steinberg, 1981; Schank, 1986). The approach presented here is to exploit generic explanation strategies and focus models (Sidner, 1983; Grosz and Sidner, 1988) to organize the back-end justification via an explanation rhetoric -- that is, a rhetorical model of strategies that humans employ to persuade, support, or clarify their position. The result is a more connected, flowing and thus easier to follow textual presentation of the explanation.</Paragraph>
  </Section>
class="xml-element"></Paper>