EN
Christopher Peacocke is supporter of the standpoint, which claims, that the connection between the content of mental states and concepts, which are constituents of the content, has implications for self-knowledge. Without an answer to the question, 'What is it for a subject to posses a concept?' we cannot answer the question, 'How does a subject acquire self-knowledge?'. The connection between a concept, its possession conditions, and semantic value Peacocke explains in Fregean way. This connection leads also to the specific model of self-knowledge constructed by Peacocke