The recent success of Project Watson, an IBM computer, in demolishing the two all-time most successful champions on the Jeopardy quiz show has focused attention on the coming of natural language understanding to computers — and to our iPhones. The trick has been to teach a computer not just to search databases of information but to understand natural human language. Imagine how convenient that would be: you'd never have to type a query or tap your phone's screen again.
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