情報処理学会 第79回全国大会講演要旨

Disambiguation of pronoun reference has been an important issue for both theoretical and computational linguists. While linguistic theories on binding conditions eliminate impossible readings to a certain extent, many inter-sentential anaphora remain ambiguous between bound variable reading and coreference with salient discourse entities, as in ``John said he broke his leg" where ``he" can refer either to ``John" or someone else previously mentioned (Reinhart 1983). Nishiguchi (2011 and others) consider pronoun resolution as a social choice among discourse participants which obeys Arrow's Impossibility Theorem (Arrow 1963). This paper further discusses discourse update of Social Welfare Function which provides updated variable assignment.