> "This is curious. The person is able to operate a key, but is unable to enter a physical code on a keypad?" That doesn't seem too implausible to me. If you

> "This is curious. The person is able to operate a key, but is unable to enter a physical code on a keypad?" That doesn't seem too implausible to me. If you thrust your key at the lock but miss... you scratch the lock maybe. Not a big deal, you can retry. But if you thrust your finger at the keypad, you might miss and hit the wrong key. Okay, so try again right? Just the same as the physical lock. Except the key only requires you to successfully align the key and the lock once. The keypad requires you to successfully align your finger and the correct key numerous times in a row. If you mess up the second or third key press, you have to start over from the beginning. So yes, depending on the nature of the impairment, a physical key might very well be easier to use than a keypad.