Also, “Detected”
This is the failure state in the stealth flowchart. This probably doesn’t need to be a note, I just want the verbiage to be visible for now.
The thief’s hidden information has been detected by the guard. No further checks need to be made and the situation can be played out.
Discovered the thief’s lie, saw the thief sneaking up, saw through the thief’s disguise, saw the thief’s trap, etc.