This one is right in the borderline and may be real photos stolen from a real person's social media account, but most of the GAN images have the head and features (eyes, mouth, etc) placed in exactly the same spot and have the same proportions; you get a sense for it fast.
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I put explanations of the tells on the AI ones and green flags for the real images to help my friends and family learn to spot fakes.
Here's a more practical one: https://uquiz.com/2qNIGU
The reflection of the lamp on the bit of table doesn't really work out either.
The tell for me is the naked globe lamp casting a focused cone of light, like what you'd see above a lamp shade.
(mini-thread, hopefully interesting to someone!)
I hope this thread was at least a little interesting to someone! It's a big interest of mine right now.