Projection Principle is a principle which says that
- representations at each level of representation are projections of the features of lexical items, notably their subcategorization features, and that
- if F is a lexical feature, it is projected at each syntactic level of representation (D-structure, S-structure, Logical Form).
The Projection Principle entails that sentence (i) cannot have the structure in (ii).
(i) I believe him to be a fool (ii) I believe [NP him] [S to be a fool]
The NP him is the subject of the embedded sentence at the level of D-structure, so it has to be analyzed as its subject at all syntactic levels of representation, even though it has objective case. See also Extended Projection Principle.
- Chomsky, N. 1986a. Knowledge of language: its nature, origin and use, Praeger, New York.
- Chomsky, N. 1981. Lectures on Government and Binding, Foris, Dordrecht.