Up to five rounds at most, if we want to catch the undercover, we must say something substantial. The key point is, the undercover doesn't know they are the undercover, and if they say something substantial, they risk exposing themselves... it's a kind of game theory.
The Gray Mist Person drew a question card, reading:
"——Please answer, do you think this kind of person is guilty?"
"Not guilty," Noel said blandly,
