Since Merchant 2001, it has been widely agreed that the licensing condition on sluicing is at least partially semantic in nature. This article argues that the semantics this condition operates on must include not only truth conditions, but also the issues introduced by existential quantification and disjunction. In the account presented here, the special role these elements play in antecedents for sluicing derives from the deep semantic connections between these elements and questions. In addition to accounting for well-known facts about sluicing in a natural way, this article also analyzes novel facts such as the interaction of sluicing with appositives and double negation, and handles recalcitrant cases such as disjunctive antecedents. The account can readily be extended to so-called ‘sprouting’ cases where the crucial material in the antecedent is an implicit argument or is missing altogether.