(By David Inman): "The possible syntactic categories are determined by reference to the noun and verb categories, which we assume to be distinguishable for every language. ❡
An category is one whose members can be freely used to attributively modify nouns (but not verbs) and are somehow differentiated from both nouns and verbs....❡
A category is one whose members can be freely used to attributively modify both nouns and verbs (i.e. they serve both the adjectival and adverbial functions). In some cases, modifiers can serve both functions without modification, and in others they are marked overtly for adjectival vs adverbial use.❡
An category is one whose members are by default adverbs, and their adjectival use strictly requires derivational morphology. Only one such case was encountered, Trió. ❡
A category signifies that there is no syntactic differentiation between attributive nominal modifiers and nouns themselves. ❡
A category signifies that there is no syntactic differentiation between attributive nominal modifiers and verbs as a lexical category. We do not distinguish among the syntactic requirements for the verb category to be used attributively..."