with Apple's rumored removal of a separate home button then multitouch unlock / swipe unlock can become a thing. Then how do you prove the user enabled the feat

with Apple's rumored removal of a separate home button then multitouch unlock / swipe unlock can become a thing. Then how do you prove the user enabled the feature? With one finger recognition they can just compel you to try each finger and it should work. Still manufacturers need to add distress recognition. use the wrong finger and it dumps all of them requiring pin only