Does chain hybridization in Irish support movement-based approaches to long-distance dependencies?

Huybregts (2009) makes the claim that hybrid A'-chains in Irish favor derivational theories of syntax over representational ones such as HPSG. In this paper, we subject this assertion to closer scrutiny. Based on a new technical proposal, we will reach the conclusion that, in principle, both derivational and representational accounts can accomodate hybrid dependencies. Thus, no argument against either approach can be made on the basis of the Irish data, disconfirming Huybregts's (2009) claim.