The Case Filter and Licensing of Empty K

In this paper, we will investigate certain phenomena which appear sensitive to particular conditions of adjacency and provide an explanation of these conditions in terms of syntactic structure and principles defined over such structure. Two interesting results which follow from such an explanation are: (i) the Case Filter given in (1) below, which stipulates that phonetically realized NPs must receive Case, may be subsumed under the Empty Category Principle, and (ii) the claim that only Case-marked traces are visible at PF (which has been suggested as an explanation of wanna contraction facts) can be given a structural account.