Symbol and his role in human and artificial cogitation

The paper deals with a topic of symbols, and their role in process of thinking both of humans and artificial systems. Main objectives are: looking into problems of symbols and symbolizing, role of symbols in perception, and relationship between language, symbols, signs and artificial (formal) inference. Gains of this work is a complex survey to the semiotics and symbols, examination of perception, and defining of some basic problems in the topic of perception. In it's first chapter, there are an detailed comparison and examination of existing semiotics' theories, and theories of symbols commonly. Second chapter is devoted to the subject of perception, and possible role of symbols in this process. Third (and last) chapter deals with question of thinking, especially that of artificial systems, compared to human