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Re:Jessica Livingston by gnicholas on Friday June 23, 2023 @05:58PM (#36452684)
> It also reminds me of a story from, I believe, Malcolm Gladwell's Blink about the tennis coach who knew before a tennis player served if they would double fault.

I believe it was from watching the serve, but not seeing where the ball went. As someone who has played tennis for many years (but not remotely professionally), it always seemed to me that the coach could simply be reading the player's expression. When you're serving, you can typically tell based on how the contact felt, and the sound it made, whether your serve was going in. It wouldn't be surprising if that could be 'read' from your face.

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