An Introduction to Default Logic

1. Default Reasoning.- 2. Formal Logic as a Knowledge Representation Scheme.- 3. First Order Logic.- 4. Nonmonotonic Extensions for First Order Logic.- 5. Presentation of Default Logic.- 6. Formal Development of Default Logic.- 7. Normal Defaults.- 8. Further Topics in Default Logic.- 9. Fragments of Default Logic.- 10. Problems with Default Logic.- 11. Default Logic Revisited.- 12. Circumscription.- 13. Other Logic Formalizations of Nonmonotonic Reasoning.- Appendix: Origin of the Theorems.- References.- Table of Symbols.

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