“…Despite (re)introducing serial derivations, HS does not provide a general solution to residual opacity (McCarthy 2000(McCarthy , 2007a, though extant work has identified some cases that HS is able to analyze (e.g., Breteler 2017, Calamaro 2017, Elfner 2016, Hall et al 2018, McCarthy 2008c, Rasin 2022, Torres-Tamarit 2016, and HS has been argued to have advantages well beyond opacity (e.g., McCarthy 2010. This suggests that serialism is not the key to understanding the kinds of opacity that parallel OT famously struggles with.…”