Responsibility and blame: a structural-model approach

  • Authors:
  • Hana Chockler;Joseph Y. Halpern

  • Affiliations:
  • College of Computer and Information Science, Northeastern University, Boston, MA;Computer Science Department, Cornell University, Ithaca, NY

  • Venue:
  • Journal of Artificial Intelligence Research
  • Year:
  • 2004

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Abstract

Causality is typically treated an all-or-nothing concept; either A is a cause of B or it is not. We extend the definition of causality introduced by Halpern and Pearl (2004a) to take into account the degree of responsibility of A for B. For example, if someone wins an election 11-0, then each person who votes for him is less responsible for the victory than if he had won 6-5. We then define a notion of degree of blame, which takes into account an agent's epistemic state. Roughly speaking, the degree of blame of A for B is the expected degree of responsibility of A for B, taken over the epistemic state of an agent.