Any interaction between humans and machines needs an interface. It doesn’t have to be a fancy thought translation device, but one way or another, humans need to tell machines what to do. Making this interaction as seamless as possible is essential to optimize how machines can assist human decision making. Everyday examples include turn-by-turn navigation or virtual assistants that can answer questions or act upon instruction, such as Siri, Alexa, Cortana, Bixby or Google Assistant.

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