We must ask whether intelligence is a one-dimensional variant, or whether there may not be different kinds of intelligence.

The human brain, built of DNA and protein against a watery background, has been the product of development for 3 and a half billion years of biological evolution, based on random effects of mutation, natural selection, and other influences.

The computer, on the other hand, built of electronic switches and electric current against a semiconductor background, has been the product of the development of forty years of human design, based on careful foresight and ingenuity of human beings, and driven forward by the necessity of serving its human users. When two intelligences are so different is structure, history, development, and purpose, it would certainly not be surprising if their intelligences were widely different in nature as well.

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