Preliminaries.- Terms of the Art.- Adequacy Conditions and Failed Theories.- Ontology.- Logical Forms and Mental Representations: The Lesson Russell's Multiple Relation Theory of Judgment.- Thought-Contents, Senses, and the Belief Relation: the Proto-Theory.- Thought-Contents, Senses, and the Belief Relation: the Full Theory.- Semantics.- Belief Reports and Compositional Semantics.- Meeting the Semantical Adequacy Conditions.- Objections and Replies.-...