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FWIW and I’m not an AI and this is a much smaller question... But there was a little test that ran around a few years back that was just “Is this smile genuine

FWIW and I’m not an AI and this is a much smaller question... But there was a little test that ran around a few years back that was just “Is this smile genuine or not” and I was able to identify 20 out of 20 pictures real and fake smiles. The pictures were gathered by asking subjects to smile and then taking the picture or taking a picture after they responded to a joke, so I guess there is still room for some of the “genuine” smiles to be faked.

crazygringo 6y ago
Well, that's actually relatively easy if you know what you're looking for -- real smiles are known as "Duchenne smiles" and involve contraction of eye muscles. And that could absolutely be done by AI today, relatively easily. The issue is the emotion behind it... you can be quite happy without smiling at all, and people who pose for the camera all day long learn to give a 100% convincing Duchenne smile no matter how they're feeling that day.