We introduce a new approach to modeling uncertainty based on plausibility measures. This
approach is easily seen to generalize other approaches to modeling uncertainty, such as …

Conditional logics have been developed as a basis from which to investigate logical
properties of “weak” conditionals representing, for example, counterfactual and default …

We investigate the notion of relevance as it pertains to 'commonsense', subjunctive
conditionals. Relevance is taken here as a relation between a property (such as having a …

In this paper we introduce Prohairetic Deontic Logic (PDL), a preference-based dyadic
deontic logic. An obligation 'α should be (done) if β is (done)'is true if (1) no¬ α∧ β state is as …

Conditional logic has been proposed as a framework for representing and reasoning with
general statements of normality, or statements dealing with prototypical proprties. Example …

One of the most important parts of designing an expert system is elicitation of the expert's
knowledge. This knowledge usually consists of facts and rules. Eliciting these rules and facts …

We study the dynamics of information change, using modal logic as a vehicle. Our semantic
perspective is that of a supermodel in which a state represents some agent's information …

In this paper we propose a preference-based conditional logic for credulous reasoning
about defaults. A conditional default “if β then by default α” is either formalized by the strong …

Conditional Zogics play an important role in recent attempts to investigate default reasoning.
This paper investigates firstorder conditional logic. We show that, as for first-order …

This paper presents the semantic of SCL, a strong conditional logic that has the desirable
properties of standard conditional logics but also deals with modes of reasoning that are …