Case distribution and φ-agreement with Polish genitive of quantification in the feature sharing theory of Agree

This paper offers a minimalist account of the distribution of the features of case, number and gender in Polish phrases with cardinal numerals and vague quantifiers (Q-NPs) in the presence and absence of genitive of quantification (GQ) based on the assumption that GQ-cardinal numerals and vague quantifiers are phrasal and are merged as adjuncts to the projection of a null functional head (F), a phase head that values its complement with GQ in contexts in which GQ is not overridden by inherent theta-related or lexical case. Whether the null head F inserted in the derivation has unvalued features of number and gender has consequences for the syntactic computation of agreement relations, in which features may be shared. Heterogeneous case distribution in Q-NPs in nominative-accusative case contexts provides evidence that F is a phase head and triggers transfer of its complement. Variable agreement patterns of both attributive adjectival modifiers and adjectival predicates in the presence of GQ are argued here to reflect attempted-but-failed syntactic agreement, which does not lead to ungrammaticality, as some features unvalued in narrow syntax can still be interpreted by morphological realization rules in PF. GQ is shown here to provide evidence that predicative adjectives cannot have their φ-features valued in situ and must be remerged in a position where their φ-probes can initiate Search for matching features. Agreement in the presence of GQ in Polish thus demonstrates that the need of features to be valued drives syntactic movement