 Knowledge is only one of a broader category of attitudes corresponding to what Lahiri (2002) calls responsive predicates. It is characteristic of responsive predicates that they accept both interrogative and declarative complements, as in ‘Mary knows/remembers/forgets who runs’ and ‘Mary knows/remembers/forgets that John runs’. Responsive predicates contrast with what Lahiri (2002) calls rogative predicates, such as ‘wonder’, ‘be curious’, and ‘inquire’, and with what Theiler et al. (2019) call anti-rogative predicates, such as ‘suspect’ and ‘hope’. Rogative predicates accept interrogative complements but do not accept declarative complements. For example, one can inquire who ate the last doughnut, but one cannot inquire that John ate the last doughnut. Anti-rogative predicates on the other hand, accept declarative complements but not interrogative complements. For instance, one can suspect that John ate the last doughnut but one cannot suspect who ate the last doughnut. 