Complementizer agreement and the relation between C° and T°

Several proposals suggest a φ-feature dependency between T and C (see amongst others Zwart 1993; Chomsky 2005). 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, namely CA with coordinated subjects and CA with external possessors, we conclude that there is no φ-feature dependency between T and C, but that T and C must each be endowed with a discrete set of φ-features