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That kinda leaves (current) biometrics in a gray zone, as fingerprints and faces can be regenerated.

You literally leave your fingerprint on every surface you touch, and faces can be covertly photographed.

I believe they were referring to the fact that you can't hit a button and generate new fingerprints for yourself. The ones you have are with you forever, generally.

Assuming you don't get a paper cut or something.

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