Representing Knowledge About Knowledge and Mutual Knowledge Said Soulhi author 1984-07 text 10th International Conference on Computational Linguistics and 22nd Annual Meeting of the Association for Computational Linguistics Association for Computational Linguistics Stanford, California, USA conference publication soulhi-1984-representing 10.3115/980491.980535 https://aclanthology.org/P84-1044/ 1984-07 194 199