Learnability of indexed constraint analyses of phonological opacity Aleksei Nazarov author 2021-02 text Proceedings of the Society for Computation in Linguistics 2021 Allyson Ettinger editor Ellie Pavlick editor Brandon Prickett editor Association for Computational Linguistics Online conference publication nazarov-2021-learnability https://aclanthology.org/2021.scil-1.15/ 2021-02 158 166