I. Introduction
II. Two approaches in linguistics
II.A. Formal Approach
II.B. Cognitive Approach
II. Cognition
II.A. Consciousness
II.B. Perception
II.C. Memory
II.D. Evaluation and Ego-centrism
II.E. Typicality, Functional Assembly
II.F. Metaphor
II. G. Metonymy
II.H. Categorization
II.I. KNOWLEDGE OF THE WORLD
III. Conclusion
References