Article

Journal of Logic, Language and Information

, 19:89

First online:

A Dynamic Logic of Agency I: STIT, Capabilities and Powers

  • Andreas HerzigAffiliated withCNRS, Institut de recherche en informatique de Toulouse, Université de Toulouse
  • , Emiliano LoriniAffiliated withCNRS, Institut de recherche en informatique de Toulouse, Université de Toulouse Email author 

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Abstract

The aim of this paper, is to provide a logical framework for reasoning about actions, agency, and powers of agents and coalitions in game-like multi-agent systems. First we define our basic Dynamic Logic of Agency (\({\mathcal{DLA}}\)). Differently from other logics of individual and coalitional capability such as Alternating-time Temporal Logic (ATL) and Coalition Logic, in \({\mathcal{DLA}}\) cooperation modalities for expressing powers of agents and coalitions are not primitive, but are defined from more basic dynamic logic operators of action and (historic) necessity. We show that STIT logic can be reconstructed in \({\mathcal{DLA}}\). We then extend \({\mathcal{DLA}}\) with epistemic operators, which allows us to distinguish capability and power. We finally characterize the conditions under which agents are aware of their capabilities and powers.

Keywords

Logic of agency STIT Coalition logic Game theory