> It was apparent on the faces of the staff that this was most unexpected ... members of the public weren't supposed to know how the system worked ... how could I possibly have known ?!?
Implies that you know more (about the system) than the public. The problem is you are assuming you know why the waiters were shocked. You also don't need the last sentence, it's implied by the first two. Here's an alternative version:
> it seemed like the waiters were shocked. I'd wager that the general public wasn't supposed to know how the system worked
> It was apparent on the faces of the staff that this was most unexpected ... members of the public weren't supposed to know how the system worked ... how could I possibly have known ?!?
Implies that you know more (about the system) than the public. The problem is you are assuming you know why the waiters were shocked. You also don't need the last sentence, it's implied by the first two. Here's an alternative version:
> it seemed like the waiters were shocked. I'd wager that the general public wasn't supposed to know how the system worked