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The Future of the Human Brain - Essay Example

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The paper "The Future of the Human Brain" pinpoints according to neuroscientists, the human brain will not grow forever; it might become double the current size. However, our intelligence will continue to grow. The improvement in human intelligence would require adding a computer interface…
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The Future of the Human Brain
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Extract of sample "The Future of the Human Brain"

A human brain is a machine, albeit a complex one, so is a computer especially a supercomputer. The brain functions on three levels: biological, psychological, and computational. The computer, on the other hand, functions essentially by the computational approach. The human brain is linked to the mind and, therefore, is capable of thinking. Many researchers in artificial intelligence (AI) believe that a computer can be made to think as well, with the help of a computer program with the right inputs and outputs (Searle, 1990).

However, Searle disputes this saying that computers, based on rules in the computer program, just manipulate symbols that are syntactic; therefore, “merely running the computer program is not enough to guarantee cognition.” Syntax of symbols and programs is only abstract and does not identify any physical phenomena whereas the domain of syntactic rules in the human brain is the sentence that is computed in combinations of fixed words as specified by the syntax. Also, more importantly, when uttered the meaning of the sentence is integrated with other information including semantic information from extra-linguistic domains such as co-speech gestures or the visual world. These steps are important for the listeners to interpret the language. Thus, in the case of a computer program, the computer which is the listener is unable to interpret the language of the computer program which is only syntactic and abstract, and devoid of the semantic framework. Therefore, computer programs are not the equivalent of nor do they have minds.

According to Searle, thinking is not analogous to formal symbol manipulation. Yet, he says he does not believe that thinking is a purely biological process. Notwithstanding the fact that advances in neuroscience have now more or less proved that all aspects of our mental life including perceptions, thinking, memories, actions, language, etc. are neurobiological processes that depend upon brain function, Searle puts forth his argument that “we might even come to be able to create thinking systems artificially”. But he hastens to add that the computer only simulates cognition but will not produce the same outcome as that of neurobiological renditions of cognition. In other words, “brains cause minds” (Searle, 1990) which is to say that the mental phenomena produced by human brains do not merely result from the brains’ computational activity. Searle rebuts the claim of the defenders of AI who say that semantics is non-existent and there is only syntax, and the mental activity is nothing but syntactic symbol manipulation, by arguing that the brain has the neurobiological capability to add meaning to symbol manipulation.       

Another attribute the human brain has and which the computer lacks is creativity. Creativity makes the brain think. The human brain does more than thinking since the semantic memory has layers of discrete, hierarchically organized concepts and propositions wherein subordinate levels will automatically inherit the propositions applying to their superordinates. For example, given the fact that birds can fly, one would not need to learn specifically that owls can fly but one would need to have the fact that the ostrich, in spite of being a bird, cannot fly. Computer programs will not provide such conceptual microfeatures; hence, the possibility of making a computer/robot that has
a mind is indeed very remote.

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