41 develop a more constrained theory of syntax. Moreover, additional support for the Binarity Principle comes from evidence that phonological structure is also binary, in that (.) a syllable like bat has a binary structure, consisting of the onset |b| and the rhyme |at|, and the rhyme in turn has a binary structure, consisting of the nucleus |a| and the coda |t| (See Radford et al. 1999, pp. 88ff. for an outline of syllable structure). Likewise, there is evidence that morphological structure is also binary: . (under the analysis proposed in Radford et al 1999, ) the noun indecipherability is.
