Publications (8)0 Total impact
Conference Paper: Introducing LUIMA
- [Show abstract] [Hide abstract] ABSTRACT: This paper expands on the previously published value judgment formalism. The representation of situations is enhanced by introducing event progressions similar to actions in general AI planning. Using event progressions, situations can be assessed as to what facts they contain as well as what facts may ensue with some likelihood, thereby opening up a situation space. Purposive legal argumentation can be modeled using propositions and rules controlling the likelihoods of value-laden consequences. The paper expands the formalism to cover event progressions and illustrates the functionality using an example based on Young v. Hitchens.
- [Show abstract] [Hide abstract] ABSTRACT: This paper explains and illustrates in an example context how case comparison in legal case-based reasoning can be modeled in the value judgment formalism. It presents a set of argument schemes corresponding to typical moves in case-based reasoning which make use of intermediate legal concepts and their impact on the applicable values.
- [Show abstract] [Hide abstract] ABSTRACT: This paper presents preliminary results in extracting semantic information from US state public health legislative provisions using natural language processing techniques and machine learning classifiers. Challenges in the density and distribution of the data as well as the structure of the prediction task are described. Decision tree models trained on a unigram representation with TFIDF measures in most cases outperform the baselines by varying margins, leaving room for further improvement.
- [Show abstract] [Hide abstract] ABSTRACT: This paper presents a technique with which instances of argument structures in the Carneades model can be given a probabilistic semantics by translating them into Bayesian networks. The propagation of argument applicability and statement acceptability can be expressed through conditional probability tables. This translation suggests a way to extend Carneades to improve its utility for decision support in the presence of uncertainty.
- [Show abstract] [Hide abstract] ABSTRACT: This paper presents a formalism modeling legal reasoning with fact patterns and their substantive effects on legal values. It centers on the concept of a value judgment, i.e. a determination that one factual situation is preferable over another by virtue of their respective effects on values. This allows the modeling of legal sources as sets of value judgments and legal methodologies as collections of argumentation schemes. The paper briefly derives the formalism from legal theory and elaborates on its use in the context of an example of hypothetical reasoning.
- [Show abstract] [Hide abstract] ABSTRACT: This paper outlines a process model for disambiguating legal provisions in order to ease their formalization into logic. It centers around a reformulation of the provision driven by critical questioning and mandatory legal justifications.
Conference Paper: Towards Modeling Systematic Interpretation of Codified Law[Show abstract] [Hide abstract] ABSTRACT: This short paper introduces the Interaction Predicate model, which attempts to model some aspects of systematic interpretation of codified law. It introduces an intermediate rule representation containing dynamic reasoning elements which make use of domain knowledge ontologies.