Abstract Expressing syllable weight by moras leads to two problems. First, there are languages, such as Wolof, with long vowels and geminates, which both make a bimoraic, but where only vowels, not count heavy for stress. Second, languages in closed syllables light stress, segmental modifications (laryngeal metathesis Cayuga degemination Chugach Alutiiq). It is argued that two-layered mora mode...