predictable relationship to their nominal counterparts and why some don't. It says that the predictable forms are denominal and that the unpredictable forms are strictly root-derived. The examples provided are of the English verbs hammer and tape. A verb such as hammer is a root-derived form, meaning that it can appear within an NP or within a VP. A denominalized verb, such as tape must first be converted from an NP because its meaning relies on the semantics of the noun. The discussion of how categorical features are determined is still up for debate and there have been numerous other theories trying to explain how words get their meanings and surface in a category. This is an issue within categorical distinction theories that has not yet come to a conclusion which is agreed upon in the linguistic community. This is interesting because phi-features in terms of person, number and gender are concrete features that have been observed numerous times in natural languages, and are consistent patterns that are rooted in rule-based grammar. References Semantics Generative syntax Linguistic morphology Syntactic relationships Syntax