Martina Wiltcshko, ICREA Research Professor at UPF and one of the regular participants of the Valence Asymmetries seminar, was invited to present her recent research on miratives on 2 December 2025. In  "Why miratives are (un)expected", she addressed the following puzzle:  the marking of mirativity is incredibly diverse across languages, and nevertheless mirative strategies are extremely wide-spread across unrelated languages, which suggests that miratives are universal. In the proposed account, Prof. Wiltcshko appealed to the Interactional Spine Hypothesis, developed in her earlier work (2021, 2024)