Recent theories of metrical structure in Optimality Theory differ starkly in whether feet can be aligned gradiently (McCarthy and Prince 1993, Gordon 2002, Hyde 2002) or only categorically (Kager 2001, 2005, McCarthy 2003, Buckley 2009). Particularly challenging for certain categorical theories are apparent cases of the initial-dactyl effect, where all feet align rightward except for the leftmo...