Reasoning with limited resources:active logics expressed as labelled deductive systems

摘要

Reasoning with limited computational resources (such as time or memory) is an important problem,in particular in knowledge-intensive embedded systems.Classical logic is usually considered inappropriate for this purpose as no guarantees regarding deadlines can be made.One of the more interesting approaches to address this problem is built around the concept of active logics.Although a step in the right direction,active logics are just a preliminary attempt towards finding an acceptable solution.Our work is based on the assumption that labelled deductive systems (LDSs) offer appropriate metamathematical methodology to study the problem.As a first step,we have reformulated a pair of active logics systems,namely the memory model and its formalized simplification,the step logic,as LDSs.This paper presents our motivation behind this project,followed by an overview of the investigations on meta-reasoning relevant to this work,and introduces in some reasonable detail the MM system.