# Efficient defeasible reasoning systems

@article{Maher2000EfficientDR, title={Efficient defeasible reasoning systems}, author={Michael J. Maher and Andrew Rock and Grigoris Antoniou and David Billington and Tristan Miller}, journal={Proceedings 12th IEEE Internationals Conference on Tools with Artificial Intelligence. ICTAI 2000}, year={2000}, pages={384-392} }

For many years, the non-monotonic reasoning community has focussed on highly expressive logics. Such logics have turned out to be computationally expensive, and have given little support to the practical use of non-monotonic reasoning. In this work we discuss defeasible logic, a less-expressive but more efficient non-monotonic logic. We report on two new implemented systems for defeasible logic: a query answering system employing a backward chaining approach, and a forward-chainingâ€¦Â

## 153 Citations

### Relating Defeasible Logic to Extended Logic Programs

- Computer Science, PhilosophySETN
- 2002

This paper gives a translation of a defeasible theory D into a program P(D) and shows that under a condition of decisiveness, the defeasable consequences of D correspond exactly to the sceptical conclusions of P (D) under the answer set semantics.

### Embedding Defeasible Logic into Logic Programs

- Computer Science, PhilosophyICLP
- 2002

This paper gives a translation of a defeasible theory D into a program P(D) and shows that under a condition of decisiveness, the defeasable consequences of D correspond exactly to the sceptical conclusions of P (D) under the stable model semantics.

### Propositional Clausal Defeasible Logic

- Philosophy, Computer ScienceJELIA
- 2008

This work defines and explains a new defeasible logic, called clausal defeasibility logic (CDL), which has all these properties, and is easy to implement, consistent, detects loops, terminates, and has a range of deduction algorithms to cater for arange of intuitions.

### Argumentation Semantics for Defeasible Logic

- Computer Science, PhilosophyJ. Log. Comput.
- 2004

Dung-like argumentation semantics is provided for two key defeasible logics, of which one is ambiguity propagating and the other ambiguity blocking, which provides the first ambiguity blocking Dung- like argumentation system.

### Argumentation Semantics for Defeasible Logics

- Computer Science, PhilosophyPRICAI
- 2000

An argumentation-based semantics for an ambiguity propagating logic is presented, which shows that defeasible logics can be characterised in a similar way as well as proof-theoretically.

### Embedding defeasible logic into logic programming

- Computer ScienceTheory and Practice of Logic Programming
- 2006

This paper gives a translation of a defeasible theory into a meta-program and shows that under a condition of decisiveness, the defeasable consequences of D correspond exactly to the sceptical conclusions of P(D) under the stable model semantics.

### Relating Defeasible and Default Logic

- Philosophy, Computer ScienceAustralian Joint Conference on Artificial Intelligence
- 2001

An ambiguity propagating defeasible logic can be directly embedded into default logic, and Computational complexity results suggest that default logics are more expressive than defeasibles logics.

### A Family of Defeasible Reasoning Logics and its Implementation

- Computer ScienceECAI
- 2000

This paper presents a family of defeasible reasoning formalisms built around Nute's defeasibility logic, and describes the motivations of these formalisms and derive some basic properties and interrelationships.

### Defeasible logic with dynamic priorities

- Computer Science, PhilosophyNMR
- 2002

This article shows how dynamic priorities can be integrated, where priority information is obtained from the deductive process itself, and defines a proof theory, study its formal properties, and provide an argumentation semantics.

### A Non-Monotonic Reasoning System for RDF Metadata

- Computer Science
- 2006

This paper presents a system for non-monotonic reasoning on the Semantic Web called VDR-Device, which is capable of reasoning about RDF metadata over multiple Web sources using defeasible logic rules and features a RuleML compatible syntax.

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