The Weasley twins at one point mention taking the corridor all the way to the magic mirror and back, although they presumably didn’t escape detection while doing so. If that’s possible, I’d say it’s unlikely that a guy like Quirrell would have found it impossible to defeat himself or (if he was concerned about detection) to leverage some student adventurer into defeating.
The Weasley twins at one point mention taking the corridor all the way to the magic mirror and back, although they presumably didn’t escape detection while doing so. If that’s possible, I’d say it’s unlikely that a guy like Quirrell would have found it impossible to defeat himself or (if he was concerned about detection) to leverage some student adventurer into defeating.
The safe bet seems to be that it’s a red herring.