>Sometimes a redundancy is just a redundancy.

and sometimes it really isn't needed (context). you're standing next to the teller's window in a bank, wanting to withdraw some cash (say you can't abide the ATMs (cash machines) in the lobby), and he asks you to enter your PIN into his little PIN-receptor device. do you do as he asks, or do you stare at him in total befuddlement? only once, at most, I wager.
-ron o.