5. Process of information
There are two divisions in the workings of human brain, consciousness and unconsciousness or subconsciousness. Consciousness is the aware process of thought and memory while unconsciousness is the unaware and unfelt brain activities. Unconsciousness contains innate instinct which is the original and innermost drive of life and determines the basic orientation of intelligence, and the other portion of unconsciousness is acquired. A notable characteristic of human brain is "unwilling" to repeat doing things consciously. Human brain spontaneously gives its repeated jobs over to its unconsciousness to run in order to concentrate on and deal with new and fresh things, and, furthermore, if the jobs dominated by unconsciousness still remain repeated, human brain will spontaneously transfer the process into instinct. In order to adapt to this process, man may even alter its body and physiological conditions and transmit the changes genetically to its offspring. This can partly explain the evolution of the structure of human body and brain.
Human sense organs receive input information all the time. The received information only through vision, hearing and tactile is very very huge in a day, however human brain will automatically sort and filter the received information first, and all the information that has no influence to man's physiological and psychological balance will be automatically sorted and filtered out. Second, the passed information will be processed as much as possible by unconsciousness. Third, only the information that unconsciousness is unable to process will be done by consciousness. Consciousness is like a corner of an iceberg above sea. Most activities of human brain and most behaviors manipulated by the brain are unconscious, and unconsciousness is the profound base of thoughts.
The information receivable to the "sense organs" or input terminals of the computer is both limited and very little, compared with the information input to human brain. The information input is confined primarily by computer programs, because the programs do not need to receive any useless or unprocessable information. This control is essentially different from the information filtration in human brain, which itself is an unconscious action. The memory and information processing is not so fathomless as many of us have imagined. The problem is that we have not yet built neural nets to perceptualize the computer so as to simulate the process of cognition, memory and other activities of human brain.
Anyhow the scope and accuracy of information that the computer can directly sense are far more powerful than that of human, once the above mentioned difficulties are overcome, we can assert that the intelligence of future cyberbrain will be above that of human being. "Directly sense" means that the cyberbrain gets information from sense organs connected through neural nets. Only this kind of received information can be processed unconsciously by filtering. The brain can also dominate behaviors of the subject via the nets. Man can enhance the ability of sensing and physical recognition with the help of tools or apparatuses, however this type of sense is indirect and conscious.
Is unconsciousness necessary to intelligence? The answer is yes. First, cyberbrain must accept all the information transmitted from sense organs, second, sorts and filters it to eliminate the information that has no effect on psychological balancing, perhaps more than 99% of the information is combed out, and third, further processing it.
Moreover, generally speaking, human can not have two conscious concentrations or attentions simultaneously. When a man concentrates on one thing or a place, all other irrespective senses will be filtered out, just as to be overridden. There is a hypothesis that one intelligent subject at a moment concentrates or operates consciously on one thing or one task only. If a cyberbrain is capable of concentrating consciously on more than one things or tasks, not exclusive of that possibility, it is a multi-subjects-in-one "ghost". Unconsciousness, however, is necessary to filter information and operate behaviors at least.
As the Chinese proverb goes, "One heart can not run two minds at the same time", but executing multi-tasks by unconsciousness is by no means multi-minded. A concentration or attention is interrupted when other stimulation is strong enough.
Imagine how a cyberbrain works without unconsciousness.
The cyberbrain has to process all the information whenever receiving it and operate every action or behavior consciously. The vital problem is that it has to record all the content and process! This issue is related to the memory structure of human brain. Only unconscious activities are not recorded or, at the utmost, very faintly recorded, whereas all conscious workings are remembered automatically to form experiences. This way makes certain what we memorize is valuable. Whether to be able to remember valuable content and process of the activities of the subject itself spontaneously is the most substantial difference between the memory of the computer and that of human brain. The current computer is not capable of keeping the same steps between running and memorizing its working process. The computer has not yet had consciousness, let alone unconsciousness.
With the nature of unconsciousness, we can do a lot in education, skill training and genetic improvement, and it can be also utilized in advertisement, social propaganda, ideological control as well as psychological wars or games.