This article proposes a revised model of the genesis Castilian Spanish /?/, based on (i) precise tracking across Late Middle Ages orthographical d ? z change in preconsonantal coda position and (ii) potential for auditory indeterminacy between denti-alveolar variants [s] non-sibilant [?]. According to findings, two phonemes, /?/ /ð/, are likely have come into existence by early 1500s, merger at...
