One can claim that the phoneme is "the" phonological unit, or one can claim that the phoneme is one of many units, including the syllable, syllabic constituents (consonant clusters, rime constituents), and features. [...] A theory of phonological encoding has to address this issue that I call the "units problem". The units problem comprises two subproblems that I call the "syllable" and the "feature paradoxes".
- Dell (2004), a pag.146