Natural language is one of the most complicated structures a man has met with. It plays a fundamental role not only in human communication but even in human way of thinking and regarding the world. Therefore, it is extremely important to study it in all its respects. Much has been done in understanding its structure, especially the phonetic and syntactic aspects. Less, however, is understood its semantics. There are many linguistic systems, often based on set theory and logic, attempting to grasp (at least some phenomena) of the natural language. However, none them is fully acceptted and satisfactory in all respects.
accepted, language, relationships, concepts
