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Critique of pure relevance

  • Relevance vs Marginal Relevance

    • A document can be redundant even if it is highly relevant

    • Duplicates

    • The same information from different sources

    • Marginal relevance is a better measure of utility for the user.

  • Using facts/entities as evaluation units more directly measures true relevance.

  • But harder to create evaluation set

  • See Carbonell reference


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