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Subject requirement and predication

In this paper, we argue that the subject requirement or Extended Projection Principle (EPP) is naturally derived from predication, not in the standard syntax-based manner of Rothstein (1983), Chomsky (1986) or Heycock (1991), but in a full-blooded semantic manner within the selective mentalist Grammar Semantics of Bouchard (1995). We propose that the EPP is the effect of a basic proposition-forming operation of natural language, which is induced by a predication operator (Bowers 1993). On our analysis, insertion of an expletive in the subject position or raising to the subject position are therefore ultimately analysed as semantically motivated processes, triggered by the operation of proposition formation.