This book constitutes the refereed post-conference proceedings of the 20th International Conference, LENLS20, held in Osaka, Japan, during November 18-20, 2023.The 19 full papers presented were carefully reviewed and selected from 46 submissions.

Putting the argumentative perspective under discussion - QUD vs argumentative goals.- Perspective and the Self in Experiential Attitude Reports.- Negation and information structure in Tree-Wrapping Grammar.- Towards a Theory of Anaphoric Binding in Event Semantics.- Matrix and Relative Weak Crossover on the Level of the Individual: An Experimental Investigation.- Additivity in Attention Semantics.- Extending Abstract Categorial Grammars with Feature Structures: Theory and Practice.- An Overt Operator Associating with Covert Focus: An Even-Like Semantics for Mandarin Geng.- Internal Reading and Reciprocity.- Dot-to-dot semantic representation.- Intonational meaning at the limits of grammar.- Comparing Degree-Based and Argumentative Analyses of Even.- Appositive Projection as Implicit Context Extension in Dependent Type Semantics.- On the semantics of dependencies: relative clauses and open clausal complements.- Semantics of Propositional Attitudes in Type-Theory of Algorithms.- A structured witness approach to pair-list answers of wh-questions with plural definites.- Two Places where We Need Plug-negation in Update Semantics: Symmetrical Presupposition Filtering and Exclusive Disjunction.- Topology and Justified True Belief: A Baseless, Evidence-Free (and Pointless) Approach.- Semantic-Pragmatic Account of Syntactic Structures.