This book constitutes extended, revised, and selected papers from the 12th International Symposium on Artificial Intelligence supported by the Japanese Society for Artificial Intelligence, JSAI-isAI 2020.

LENLS Logic and Engineering of Natural Language Semantics (LENLS) .- A Semantics for “Typically” in First-Order Default Reasoning.-  On dialogue modeling: a dynamic epistemic inquisitive approach.-  Knowledge acquisition from natural language with Treebank Semantics and Flora.- The Explicated Addressee: A (mainly) pragmatic account of Japanese ka-questions.- Superlative Modifiers as Concessive Conditionals.- Polynomial Event Semantics: Negation.- Oleg Kiselyov Experiential Imagination and the Inside/Outside-Distinction.- Against the multidimensional approach to honorific meaning: A solution to the binding problem of conventional implicature.- A Persona-based Analysis of Politeness in Japanese and Spanish.- JURISIN2020 Fourteenth International Workshop on Juris-informatics (JURISIN 2020) .- AI and Judicial Policy.- Differential Translation for Partially Amended Japanese Statutory Sentences.- Aspect Classification for Legal Depositions.- COLIEE 2020: Methods for Legal Document Retrieval and Entailment.- COLIEE 2020: Legal Information Retrieval & Entailment with Legal Embeddings and Boosting.- BERT-Based Ensemble Model for Statute Law Retrieval and Legal Information Entailment.- Chuen Huang The Application of Text Entailment Techniques in COLIEE 2020.- Information Extraction / Entailment of Common Law & Civil Code.- Paragraph Similarity Scoring and Fine-Tuned BERT for Legal Information Retrieval and Entailment.- Using BERT and TF-IDF to Predict Entailment in Law-Based Queries.

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