In 1966, German American computer scientist Joseph Weizenbaum, a professor at the Massachusetts Institute of Technology (MIT), created a computer program he dubbed ELIZA.It was a rudimentary version of artificial intelligence, named after Eliza Doolittle, the working-class woman from George Bernard Shaw's Pygmalion who learns how to behave like a "lady".The program could do little more than repeat back what it was told, phrased as a question. For Weizenbaum, who escaped Nazi Germany 30 years earlier, ELIZA was a way to highlight the limitations of AI.For some users, including his secretary, it became almost a companion; when she noticed Weizenbaum...