| Challenge: | Optimality Theory and Harmonic Grammar are constraint-based implementations of phonological theory that do not tamper with typological structure induced by categorical frameworks. |
| Approach: | They propose to model the implicational universals of phonological theory, called T-orders, and to use stochastic constraint-based frameworks to model them. |
| Outcome: | The proposed frameworks do not tamper with typological structure induced by categorical frameworks. |
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