Affix vowels often alternate to agree with stem vowels in a pattern dubbed root-outward harmony. I propose that root-outward harmony is subject to a condition that a stem not be phonologically altered under affixation. This analysis accounts most parsimoniously for the core empirical generalization of root-outward harmony: that stem vowels never alter-nate to agree with affix vowels even if the only alternative is for stem and affix to dis-agree. Analyses in terms of underspecification and/or directionality capture this generali-zation less readily. I formalize the proposed analysis in terms of stem-affixed form faith-fulness in Optimality Theory and compare it with likely alternatives.
My goal in this paper is to demonstrate how the basic logic of constraint ranking in Optimality Theory (OT; Prince & Smolensky 1993/2004) directly predicts the disjunctive application of processes in an 'elsewhere' relationship without the need for a separate principle like the Elsewhere Condition (the EC; Anderson 1969, 1974, Kiparsky 1973) and its attendant problems of formulation in the theory of ordered string-rewriting rules (SPE; Chomsky & Halle 1968). The various details of the empirically correct ormulation of the EC (Halle 1995, Halle & Idsardi 1997) that must be independently stipulated in SPE all fall out as a necessary consequence of constraint ranking logic in OT.
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