• 1 Introduction.- 2 The Role of Logic in Legal Reasoning.- 3 The Need for New Logical Tools.- 4 Logics for Nonmonotonic Reasoning.- 5 Representing Explicit Exceptions.- 6 Preferring the Most Specific Argument.- 7 Reasoning with Inconsistent Information.- 8 Reasoning about Priority Relations.- 9 Systems for Defeasible Argumentation.- 10 Using the Argumentation System.- 11 Conclusion.- A Notations, Orderings and Glossary.- A1 General Symbols and Notations.- A2 Ordering Relations.- A3 Notions of the Argumentation System of Chapters 6–8.- A4 Glossary.- References.

'The main contribution of Prakken's work is its organization and expression of non-technical ideas. Prakken successfully makes the best possible case for logic as a tool for modeling legal reasoning. He has written the best, most technically detailed, and fairest survey of the formal work on argument and defeasible reasoning.' Ronald P. Loui, Artificial Intelligence and Law, 3 (1995) '... Prakken has written the best current text with which the interested logician can quickly study the main surviving applicable ideas of non-monotonic reasoning and can glimpse the themes that are shaping current research in defeasible reasoning.' The Journal of Symbolic Logic, 64:4 (1999)

• 1 Introduction.- 2 The Role of Logic in Legal Reasoning.- 3 The Need for New Logical Tools.- 4 Logics for Nonmonotonic Reasoning.- 5 Representing Explicit Exceptions.- 6 Preferring the Most Specific Argument.- 7 Reasoning with Inconsistent Information.- 8 Reasoning about Priority Relations.- 9 Systems for Defeasible Argumentation.- 10 Using the Argumentation System.- 11 Conclusion.- A Notations, Orderings and Glossary.- A1 General Symbols and Notations.- A2 Ordering Relations.- A3 Notions of the Argumentation System of Chapters 6–8.- A4 Glossary.- References.

'The main contribution of Prakken's work is its organization and expression of non-technical ideas. Prakken successfully makes the best possible case for logic as a tool for modeling legal reasoning. He has written the best, most technically detailed, and fairest survey of the formal work on argument and defeasible reasoning.' Ronald P. Loui, Artificial Intelligence and Law, 3 (1995) '... Prakken has written the best current text with which the interested logician can quickly study the main surviving applicable ideas of non-monotonic reasoning and can glimpse the themes that are shaping current research in defeasible reasoning.' The Journal of Symbolic Logic, 64:4 (1999)

• 1 Introduction.- 2 The Role of Logic in Legal Reasoning.- 3 The Need for New Logical Tools.- 4 Logics for Nonmonotonic Reasoning.- 5 Representing Explicit Exceptions.- 6 Preferring the Most Specific Argument.- 7 Reasoning with Inconsistent Information.- 8 Reasoning about Priority Relations.- 9 Systems for Defeasible Argumentation.- 10 Using the Argumentation System.- 11 Conclusion.- A Notations, Orderings and Glossary.- A1 General Symbols and Notations.- A2 Ordering Relations.- A3 Notions of the Argumentation System of Chapters 6–8.- A4 Glossary.- References.

'The main contribution of Prakken's work is its organization and expression of non-technical ideas. Prakken successfully makes the best possible case for logic as a tool for modeling legal reasoning. He has written the best, most technically detailed, and fairest survey of the formal work on argument and defeasible reasoning.' Ronald P. Loui, Artificial Intelligence and Law, 3 (1995) '... Prakken has written the best current text with which the interested logician can quickly study the main surviving applicable ideas of non-monotonic reasoning and can glimpse the themes that are shaping current research in defeasible reasoning.' The Journal of Symbolic Logic, 64:4 (1999)