Opacity in Lardil: stratal vs. serial derivations in OT

is paper presents a derivational OT account of the word-nal deletion and augmentation alternations in Lardil. It presents two arguments in favor of the stratal view of derivations where the grammar is dišerent at dišerent stages (Bermúdez-Otero forthcoming, Kiparsky forthcoming), and against the serial view where the ranking is the same at all steps, and each step constitutes a minimal change (McCarthy 2006, 2007 et seq.). First, Lardil consonant deletion and vowel deletion cannot both be harmonically improving with respect to the same OT ranking (Kavitskaya and Staroverov 2010, McCarthy 2006). Second, the patterns ofminimal word augmentation require some amount of derivational lookahead in a theory where each derivational step may only involve a minimal change.