Smile! You're Being Ranked!

If you're a busy commuter, doesn't a happy public transit officer immediately make your whole morning? Clearly Japan has realized this truism, as they're recently developed a way to "rate" smiles. A machine measures your smile and lets you know how you're doing. Frowning? You get a zero. Beaming? Maybe an 8.5. Cheshire cat? 10 ...

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