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It seems possible to make decent face predictions based on genome data: https://phys.org/news/2017-09-identification-individuals-trait-whole-genome-sequencing.html Maybe someone can train a deep net to do paternity testing based on facial images?
I have an awesome business idea.
Set up a kiosk at a fair or something, point a webcam at the crowd, and yell at passing families: "Hey, dude, do you know the AI says these kids aren't yours?"