Note her speech tone, gestures, blinking patterns, etc.

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The ability of a device to read both gestures and speech seemed like something out of science fiction, and the possibilities one could imagine with such a device were limitless.

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This research helped give rise to a theory that human language has its roots not in speech, but in hand gestures.

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When telling the truth, people often make hand gestures to the rhythm of their speech.

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Only later, this argument goes, did the sophisticated brain circuitry for reading gestures get rewired in humans to process speech.

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At this point, the speech is destined for failure, and it all started as a chain reaction triggered by not using natural hand gestures.

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