It follows from the same ordering relationships that underlying sequences of a

It follows from the same ordering relationships that underlying sequences of a stressable and an unstressable vowel will not yet have been eliminated, under the diacritic or the metrical theory, at the point in derivations at which alternating stressability is assigned. Thus we expect that unstressasble vowels in such sequences will play the same kind of role in determining alternating stressability as any other underlying unstressable vowels. This prediction is incorrect.