White AI faces judged human more often than actual human faces

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There's an obvious trend there of older faces being judged as human and younger faces being judged as AI. A little less obvious, it also looks like "scruffy" male faces may be judged as human while clean shaven males or males with well trimmed beards are judged as AI. I wonder if the study noticed / addressed that at all.
- Also the shadows. No shadows (special lightning) is judged as AI generated. Where strong shadows is judged natural.
  
  This is my number one giveaway for AI gen. There's definitely a style out there which only shows flat, even lighting, with the subject viewed from directly in front. AI Female 44 in the OP is one such example
- Also, prettier faces are judged more as AI than less pretty ones.
  
  Intuitively that makes perfect sense to me, since young and attractive humans is what people generate most often
That's kinda the premise of GAN, it's generator is going to keep generate more and more "human" faces until it's discriminator can no longer determine them as generated. It's literally generating more human humans than real humans (according to itself)
Well yeah, look at how bad those real photos are. Two of them are even distorted.

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