This paper investigates how the distribution of negative polarity items can inform our understanding of the underlying semantic representation of constituent questions. It argues that the distribution of NPIs in questions is governed by the same logical properties that govern their distribution in declarative constructions. Building on an observation due to Guerzoni and Sharvit that strength of exhaustivity in questions correlates with the acceptability of NPIs, I propose a revision of the semantics of questions that can explain this link in (...) terms already familiar from the literature of negative polarity, namely the availability of a local downward entailing environment. I argue for a new theory of questions that takes strength of exhaustivity to be encoded internal to the question nucleus rather than in different answer-hood operators. This switch, while conceptually a simple move, has far-reaching consequences in the domain of questions. I also show how this new analysis can account for a host of issues related to NPIs, such as the subject–object asymmetry noted by Han and Siegel, the interaction between NPIs and high versus low wh-adjuncts, the varying acceptability of NPIs in the restrictor of which-phrases, and the contrast between weak and strong NPIs. (shrink)