You are correct. I am not in disagreement with you. We definitely need a way to authenticate people. But like I said, authenticating systems need to be fool-pro

You are correct. I am not in disagreement with you. We definitely need a way to authenticate people. But like I said, authenticating systems need to be fool-proof enough to not allow false positives yet flexible enough to allow people to screw up and get a fresh start without wiping all their data. These two goals, by definition are the equivalent of trying to look towards the left and right at the same time.