Sophie makes a point of reading the posted rules--rules posted on all four walls of the room and (as she well knows) outside the entrance, too. "Strange, I don't see exceptions listed. You must be tired. I suggest a break since your attention to detail appears to be flagging." Profoundly.

She smiles serenely. The noise explains the number of people she'd noted in the atrium when she came in.

[ETA: because I left out a phrase.]