Eng. 100 – sum. 121 Elshim, Fall '98 Directions: You have 45 minutes to read and summarize the following passage. The number of words in the passage is indicated in brackets, at the end of the passage. Your summary should be approximately one third the length of the original text. The Difference between a Brain and a Computer Isaac Asimov The difference between a brain and a computer can be expressed in a single word: complexity. The large mammalian brain is the most complicated thing, for its size, known to us. The human brain weighs three pounds, but in that three pounds are ten billion neurons and a hundred billion smaller cells. These many billions of cells are interconnected in a vastly complicated network that we cannot begin to unravel as yet. Even the most complicated computer man has yet built cannot compare in intricacy with the brain. Computer switches and components number in the thousands rather than in the billions. What is more, the computer switch is just an on-off device, whereas the brain
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