In this book, Julius M. Moravcsik disputes that a natural language is not and should not be represented as a formal language. The book criticizes current philosophy of language as having an altered focus without adjusting the needed conceptual tools. It develops a new theory of lexical meaning, a new conception of cognition-humans not as information processing creatures but as primarily explanation and understanding seeking creatures-with information processing as a secondary, derivative activity. In conclusion, based on the theories of lexical meaning and cognition, this work sketches an argument showing that the human understanding of human understanding must always remain just partial.