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Test Yourself: Which Faces Were Made by A.I.?
(www.nytimes.com)
Got 6/10, for at least 2 pictures I looked at the outside corners of the eyes, if they match it's likely AI, most real humans likely do not have symmetry there.
Well since it's a bunch of real faces combined it's not that difficult to make a realistic face.
This is a most excellent place for technology news and articles.