We define an order independent version of default unification on typed feature structures. The operation is one where default information in a feature structure typed with a more specific type, will override default information in a feature structure typed with a more general type, where specificity is defined by the subtyping relation in the type hierarchy. The operation is also able to handle feature structures where reentrancies are default. We provide a formal semantics, prove order independence and demonstrate the utility (...) of this version of default unification in several linguistic applications. First, we show how it can be used to define multiple orthogonal default inheritance in the lexicon in a fully declarative fashion. Secondly, we show how default lexical specifications (introduced via default lexical inheritance) can be made to usefully persist beyond the lexicon and interact with syntagmatic rules. Finally, we outline how persistent default unification might underpin default feature propagation principles and a more restrictive and constraint-based approach to lexical rules. (shrink)

The term ‘ellipsis’ can be used to refer to a variety of phenomena: syntactic, semantic, and pragmatic. In this article, I discuss the recent comprehensive survey by Stainton 2006 of these kinds of ellipsis with respect to the analysis of nonsententials and try to show that despite his trenchant criticisms and insightful proposal, some of the criticisms can be evaded and the insights incorporated into a semantic ellipsis analysis, making a ‘divide-and-conquer’ strategy to the properties of nonsententials feasible after all. (...) -/- Editor's comment: To find the contribution, please go to item 16 of the URL, which contains the full text. Professor Merchant has permitted this. (shrink)

VP-ellipsis and pseudogapping in English show a previously unnoticed asymmetry in their tolerance for voice mismatch: while VP-ellipsis allows mismatches in voice between the elided VP and its antecedent, pseudogapping does not. This difference is unexpected under current analyses of pseudogapping, which posit that pseudogapping is a kind of VP-ellipsis. I show that this difference falls out naturally if the target of deletion in the two cases differs slightly: in VP-ellipsis, a node lower than [voi(ce)] is deleted, while in pseudogapping (...) a node containing [voi] is deleted. Moreover, this analysis accounts for a new observation concerning the distribution of floating quantifiers in these two constructions. (shrink)