# Imagining Probabilistic Belief Change as Imaging (Technical Report)

## TL;DR

This paper introduces Expected Distance Imaging (EDI), a flexible framework for probabilistic belief change that unifies Bayesian conditioning and imaging, with multiple instantiations for revision and update.

## Contribution

The paper proposes EDI, a novel general framework for belief change that encompasses existing imaging methods and defines new instantiations for revision and update.

## Key findings

- EDI can replicate Bayesian conditioning and other imaging forms
- Four EDI instantiations are proposed for revision and update
- Probabilistic rationality postulates are analyzed for these instantiations

## Abstract

Imaging is a form of probabilistic belief change which could be employed for both revision and update. In this paper, we propose a new framework for probabilistic belief change based on imaging, called Expected Distance Imaging (EDI). EDI is sufficiently general to define Bayesian conditioning and other forms of imaging previously defined in the literature. We argue that, and investigate how, EDI can be used for both revision and update. EDI's definition depends crucially on a weight function whose properties are studied and whose effect on belief change operations is analysed. Finally, four EDI instantiations are proposed, two for revision and two for update, and probabilistic rationality postulates are suggested for their analysis.