The existence of correlations between the positive setting of the Null Subject Parameter and other grammatical properties has recently been called into question (see Newmeyer (2005)). In this paper, I show that the pro ref −→pro −ref correlation appears to be exceptionless and that it follows directly from the theory of pro-drop in Rizzi (1986). Rizzi (1982) proposes that the availability of Free Inversion is what allows for the lack of that-t effects in pro-drop languages; this, I further show is empirically untenable. I present data from several Creole languages that suggest that the lack of that-t effects in these languages is related to the availability of null expletive pro. I take the latter to be a sufficient, but not necessary, condition for the lack of that-t effects. I finally discuss the implication of this finding for the Parametric model.
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