It’s an equivalent key. It unlocks the same door. It doesn’t matter if it’s the same bits, because the only thing we care about is whether it unlocks the door.

It’s an equivalent key. It unlocks the same door. It doesn’t matter if it’s the same bits, because the only thing we care about is whether it unlocks the door. Two different combinations for the same lock serve as backups for each other for practical purposes. They could even be entirely different methods of access, like a Yubikey or backup codes. What matters is that you have independent ways to get in.