In formal semantics a responsive predicate is an embedding predicate which can take either a declarative or an interrogative complement.
For instance, the English verb know is responsive as shown by the following examples.
[1][2][3] Responsives are contrasted with rogatives such as wonder which can only take an interrogative complement and anti-rogatives such as believe which can only take a declarative complement.
Some analyses have derived these distinctions from type compatibility while others explain them in terms of particular properties of the embedding verbs and their complements.
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