Presupposition and Implicature in Model-Theoretic Pragmatics Douglas B Moran author 1981-06 text 19th Annual Meeting of the Association for Computational Linguistics Association for Computational Linguistics Stanford, California, USA conference publication moran-1981-presupposition 10.3115/981923.981954 https://aclanthology.org/P81-1025/ 1981-06 107 108