the concept of cognitive pattern recognition, and its difference from the basic physical pattern recognition. Also is proposed the not commonly used concepts of pattern processing and pattern learning as playing key cognitive functions to explain the mind functioning. 

## 4.1. Pattern And Pattern Recognition - Definitions And Mechanisms

Here is proposed that the concepts of pattern and pattern recognition can be defined first as a general physical phenomenon: 
Pattern recognition is the physical phenomenon of identification of physical quantities changes of a physical system by a physical pattern recognition mechanism. 

Pattern is a set of identifiable physical quantities changes of a physical system by a physical pattern recognition mechanism.

The above definitions depends strictly on the pattern recognition mechanism. An accurate definition of the mechanism is necessary to accurately define the general pattern recognition concept as a physical phenomenon. Also the words identification and identifiable actually belongs to the cognitive science scope, and is generally an abstract concept related to detection, perception, sensing, measuring, etc, functions. The advance proposed here is that the identification cognitive concept can be a well defined physical phenomenon. 

The pattern recognition phenomenon occurs when a physical system interacts changing some system physical quantities that can be defined as the pattern recognition identification mechanism. For example, a lever is a system that can recognize a force applied in one of its side by changing the lever side position, a molecule is a mechanism that can recognize another chemical reactive molecule by changing the molecule chemical structure, a living cell is a system that can recognize many inorganic and organic molecules by metabolic activity, etc. 

A conclusion proposed here is that any simple or complex machine, any functional interacting system, or any physical law or interaction, are formally isomorphic to this definition of physical pattern recognition mechanism, as will be argued further below in the philosophical proposal (section 7). 

Then some questions arise. How can we relate or differ this basic physical pattern recognition description to the cognitive description of living systems or algorithmic and computational pattern recognition? For example, the immune system can recognize and also memorize a great number of organic molecules and also learn to recognize new antigen patterns and memorize them. Can it be defined as an intermediary pattern recognition system between a basic physical pattern recognition and a neurological cognitive pattern recognition definitions? And what are the key functions of cognitive pattern recognition systems, and do they have any advantage from the more basic physical pattern recognition systems? 

A proposed definition of a **Cognitive Pattern Recognition** systems like human mind is the capability of combinatorial integration of **processing**, and **learning** of inter-activating physical values changes, that can be identified to **control** the overall behavior, performing recognition, action-reaction and decision functions. Some advantages of this definition are that combinatorial systems structure scale to an 