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Combinatorics for Metrical Feet

Halle & Vergnaud (1987) propose a convention on the parsing of elements into metrical feet — the Exhaustivity Condition — that requires all elements to belong to some foot, except for certain principled cases of extrametricality. However, the general consensus now prevailing is that even internal metrical elements can remain unparsed, failing to belong to any foot, generalizing the notion of extrametricality. Hayes (1995), Halle & Idsardi (1995), and Kager (1999), among many others, explicitly reject the Exhaustivity Condition. Hayes’s comments are given in (1), Halle & Idsardi’s are given in (2).