In the 1950s and 1960s, overconfident computer scientists, who were working in the new field of “artificial intelligence” (AI), predicted that computerized robots and other “artificially intelligent” devices soon would catch up to – or even surpass – human beings in a wide diversity of skills and activities. Within two or three decades, said the most optimistic AI researchers, artificially intelligent devices would be able to pass the famous “Turing Test” by conversing with humans using teletype machines so successfully that the humans would not realize that they were talking to computers rather than to people. Some predictions were quite remarkable: robots would be on the moon or Mars or other planets, deciding for themselves where to go and what to do, carrying on conversations with humans back on earth – robot butlers would fetch and carry objects, cook meals, and clean the house for their human owners – AI doctors would diagnose diseases, prescribe and administer medicines and therapies. At the peak of this optimism in the 1970s, a number of AI companies were founded and invested many millions of dollars in various AI projects. By the end of the 1980s, however, none of the optimistic predictions had come true, and most of the AI companies had gone out of business. An “AI Winter” had set in!
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