The proposition that the mental lexicon is a 'dual route'system, advanced by Pinker and
others to account for regular and irregular morphology, overlooks the important fact that
morphological regularity correlates inversely with phonological regularity—'regular'past-
tense beeped being phonologically irregular (exceptional syllable), while 'irregular'past-
tense kept is phonologically just regular. I argue that the correlation, which is general, can
only be captured under a single—rather than 'dual'—architecture, and an associational …