"Predicate dualism" is most easily defined as the negation of "predicate monism". Predicate monism can be characterized as the view subscribed to by eliminative materialists, who maintain that such intentional predicates as "believe", "desire", "think", "feel", etc., will eventually be eliminated from both the language of science and from ordinary language because the entities to which they refer do not exist. Predicate dualists believe that so-called "folk psychology," with all of its propositional attitude ascriptions, is an ineliminable part of the enterprise of describing, explaining, and understanding human mental states and behavior.