Using counterfactuals in knowledge-based programming

  • Authors:
  • Joseph Y. Halpern;Yoram Moses

  • Affiliations:
  • Cornell University, Ithaca, NY;9 Alexander Yanai, Israel

  • Venue:
  • TARK '98 Proceedings of the 7th conference on Theoretical aspects of rationality and knowledge
  • Year:
  • 1998

Quantified Score

Hi-index 0.00

Visualization

Abstract

We show how counterfactuals can be added to the framework of knowledge-based programs of Fagin, Halpern, Moses, and Vardi [1995, 1997]. We show that counter-factuals allow us to capture in a natural way notions like minimizing the number of messages that are sent, whereas attempts to formalize these notions without counterfactuals lead to some rather counterintuitive behavior. We also show how knowledge-based programs with counterfactuals can capture subgame-perfect equilibria in games of perfect information.