Walter Hickey makes that claim for Wolfram Alpha, brainchild of Mathematica's author, and he lists his reasons on Business Insider: "It's not a search engine, it's not an encyclopedia, and it's not a calculator, but it's a little bit of all of that. It's really the only member of its field." Examples: You can calculate the odds in almost any game of chance, or find out "how long it takes to write, read or speak a certain number of words."
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