6.1. Describe concisely the set of noun phrases this grammar tool generates without one.
6.2. What effect does adding one-1 to the lexical inventory have? Does it allow the generation of ungrammatical strings?
- Every noun phrase begins with a determiner, but there is a zero determiner so this constraint is not visible on the surface. Proper names and the abstract nouns chemistry and physics only occur with the zero determiner. Other nouns must occur with an overt determiner.
- Adjectives are introduced as left adjuncts and can be stacked recursively. There are no constraints on which adjectives can modify which nouns.
- PPs headed by of must be complements and only occur with certain nouns.
- PPs headed by from are always adjuncts and can occur with any noun.
One-1 substitutes for any noun. The string and structure produced are often grammatical even when the substitution viewed as an interpretative process would not be appropriate. Among the ungrammatical strings produced by substitution are "*a one" and, somewhat more doubtfully, "*the one of NP." Other ungrammatical strings are also produced; for example, "*quick one."
6.3. What effect is produced by using one-2 in place of one-1?
Because its tree is rooted in NP rather than N, using one-2 eliminates strings of the form "D one of NP" from the
set generated by the grammar.