Complementizer Agreement and the Relation between C⁰ and T⁰

Several proposals suggest a φ-feature dependency between C⁰ and T⁰ (see, e.g., Zwart 1993, Chomsky 2008). In most (if not all) of these proposals, the core piece of empirical evidence is complementizer agreement (CA). On the basis of two sets of CA data, CA with coordinated subjects and CA with external possessors, we conclude that there is no φ-feature dependency between C⁰ and T⁰; instead, C⁰ and T⁰ must each be endowed with a discrete set of φ-features.