4.1 Why the Noun is not the Head of the DP
The first consists of a determiner and a noun, which we have so far been describing as a head followed by its complement, in the usual English pattern. The second a pronoun, and we have claimed that pronouns are ‘intransitive’ determiners, i.e. determiners without an NP complement. The third consists of just a proper noun and the last just a plural count noun. These last two examples are puzzling: how can they be considered as DPs when they contain no determiner? Perhaps these are not DPs at all, but simply NPs. But if this is true, as all the examples in (1) have the same distribution, they must all be considered NPs. Thus, the pronoun should be categorised as a noun and the determiner in (1a) is not the head of the phrase, but some other element within the NP, perhaps an adjunct or a specifier (it is on the wrong side to be considered a complement).