Visualization of Hajime Yoshino’s Logical Jurisprudence
Hajime Yoshino’s Logical Jurisprudence (LJ) is an important concept in legal informatics. Yoshino aims for a logic-based systematization in the legal domain. He focuses on legal reasoning and systematization. Inevitably, embracing law as a whole brings us to Hans Kelsen’s Pure Theory of Law. In sum, three issues are important in LJ: logic, Kelsen and legal informatics. In this paper we aim to visualize the architecture of LJ. We suggest expanding this with legal ontologies and words. The granularity of word-phrase-sentence-text is about different methods which apply to different units.
Table of contents
- 1. Introduction
- 2. Introducing Yoshino’s Logical Jurisprudence
- 3. Logical Jurisprudence
- 3.1. Legal Sentences
- 3.2. Three Primitives: Legal Sentence, Validity and Inference Rule
- 3.2.1. Connections of Legal Sentences
- 3.2.1.1. Connector ‘and’
- 3.2.1.2. Connection into a Legal Complex Sentence
- 3.2.1.3. Connection between Legal Object Sentence (LOS) and Legal Meta-Sentence (LMS)
- 3.2.1.4. Connection between LMS and LMS
- 3.2.2. Legal Inference
- 3.3. Fundamental Legal Meta-Rule Sentence (FLMRS)
- 3.4. Legal Meta-Rule Sentence (BLMRS)
- 4. Comparison of Yoshino’s LJ with Kelsen’s PTL
- 5. Conclusions
- 6. References