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Studies in Legal LogicReason-Based Logic

Studies in Legal Logic: Reason-Based Logic Chapter 3 1. REASON-BASED LOGIC AS AN EXTENSION OF PREDICATE LOGIC ‘Traditional’ logics such as propositional and predicate logic sketch a one- sided picture of what goes on in real life reasoning. Arguments of the form ‘modus ponens’ have a dominant place in this picture. Other forms of reasoning, such as arguments based on balancing reasons, can only with some ingenuity be modeled in these logics. Since such arguments play an important role both in the law and in practical reasoning in general, it is attractive to have a logic at one’s disposal that can deal with arguments based on the balancing of reasons for and against a conclusion. Reason- based Logic (RBL) is such a logic. One way to look at RBL is as a logic that is dedicated to practical (legal and moral) reasoning, with special attention to entities that function prominently in these types of reasoning, such as rules and principles. This is the way in which RBL was introduced in my Reasoning with Rules. Another way to look at it, which I want to emphasize here, is as an extension of predicate logic. First order predicate logic is included in RBL and RBL adds to http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

Studies in Legal LogicReason-Based Logic

Part of the Law and Philosophy Library Book Series (volume 70)
Studies in Legal Logic — Jan 1, 2005

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Publisher
Springer Netherlands
Copyright
© Springer 2005
ISBN
978-1-4020-3517-3
Pages
69 –99
DOI
10.1007/1-4020-3552-7_4
Publisher site
See Chapter on Publisher Site

Abstract

Chapter 3 1. REASON-BASED LOGIC AS AN EXTENSION OF PREDICATE LOGIC ‘Traditional’ logics such as propositional and predicate logic sketch a one- sided picture of what goes on in real life reasoning. Arguments of the form ‘modus ponens’ have a dominant place in this picture. Other forms of reasoning, such as arguments based on balancing reasons, can only with some ingenuity be modeled in these logics. Since such arguments play an important role both in the law and in practical reasoning in general, it is attractive to have a logic at one’s disposal that can deal with arguments based on the balancing of reasons for and against a conclusion. Reason- based Logic (RBL) is such a logic. One way to look at RBL is as a logic that is dedicated to practical (legal and moral) reasoning, with special attention to entities that function prominently in these types of reasoning, such as rules and principles. This is the way in which RBL was introduced in my Reasoning with Rules. Another way to look at it, which I want to emphasize here, is as an extension of predicate logic. First order predicate logic is included in RBL and RBL adds to

Published: Jan 1, 2005

Keywords: Predicate Logic; Abstract Reason; Public Prosecutor; Decisive Reason; Rule Application

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