 In order to understand these claims and the relations between them it is necessary to appeal to some accounts of truth, truth-bearers, states of affairs, obtaining, objects, properties, relations and exemplification. Propositions are a popular candidate for the role of what is true or false. One view of propositions has it that these are composed exclusively of concepts, individual concepts (for example, the concept associated with the proper name “Sam”), general concepts (the concept expressed by the predicates “is sad” and “est triste”) and formal concepts (for example, the concept expressed by “or”). Concepts so understood are things we can understand. Properties and relations, we may then say, are not concepts, for they are not the sort of thing we understand. Properties are exemplified by objects and objects fall under concepts. Similarly, objects stand in relations but fall under relational concepts.