"Maybe this hospital was unusually large?" Natasha thought back and said, "There were quite a lot of wards along the way here, so perhaps it needed corridors this long?"
"But the wards themselves aren't large." Batman examined the room and said, "What's very strange is that most of the wards here are doubles or singles, with no large communal wards. Surely not every patient is a dangerous case with extreme aggression?"
"If that's the case, then for the hospital's operators, building more large wards and adding an appropriate number of single or double rooms would be the best choice. It would lower construction costs while accommodating more patients."
"And have you noticed?" Batman walked to the wall at the side of the room, rapped his knuckles against it, and said, "The walls separating the rooms are extremely thick, but the corridor walls and exterior walls are normal."
Natasha was somewhat confused by what he said, so she asked, "What exactly have you figured out?"
Batman paced before the door, reasoning it out from the beginning.
"This setting was created by the murderer. There must be a reason why he created a complex hospital with corridors, ward lobbies, and all kinds of rooms, instead of simply making a space and locking us inside."
"When analyzing a method, I tend to assume that effort and gain are proportional. Only greater gains would make a murderer employ a more complicated method."
"Since the murderer's goal is to kill us, and there are no laws to worry about here, he wouldn't use a more complicated method like an ordinary person just to confuse the police and escape punishment. In other words, the benefit he gains from this method must be direct."
"And in this game, there is only one direct benefit: killing us and