(11.21 morning) Reasoning question, please listen to the question
December 22, 1994, a priceless painting was stolen during an exhibition in northern Canada. Detective Pighead determined from the surveillance footage that the painting was stolen between 9:00 PM and 9:30 PM and immediately brought in these four people.\ Person A held the exhibition's ticket and said, "I was indeed at the exhibition at that time, but I left at 9:15 PM. I really didn't steal the painting, the security guard at the entrance can testify."\ Person B said, "I am an explorer. I arrived at town at 8:00 AM this morning. I heard that the snow-covered mountains behind are a good place for exploration. Look, this is a photo I took in the morning (in the photo, B is standing at the foot of the snow mountain, wearing a black hat), and then I was exploring until 8:00 PM when I finally returned home to rest. I was extremely tired."\ Person C held a nearly dead flashlight and said, "I am a geologist. I came here the day before yesterday and have been conducting local research. From 6:00 PM to the time you summoned me, I was at home organizing materials and never went out."\ Person D said, "At 9:00 PM I received a call from my wife telling me to go home and cook. Look, the phone still has the call record."\ Detective Pighead looked at the items they were holding and then glanced around before pointing out who the thief was.\ Do you know who the thief is? What
Replies (19)
On December 22, 1994, it was polar night in northern Canada. It is normal for C, as a geologist on an expedition, to carry a nearly dead flashlight, and A also showed no suspicious signs. However, B's photo is very clear, so B's photo must have been taken earlier.
I've been constantly surveying locally and also constantly organizing materials at home. The flashlight ran out of power—in summary, it equals C.
C is suspicious; they haven't gone out since 18:00, so what's going on with that nearly dead flashlight?
The suspect's time of committing the crime was from 21:00 to 21:30, while the alibi evidence Ding presented was 21:00. Isn't that too coincidental? From this, my conclusion is: Ding conspired with his wife to steal the painting; or Ding had two phones and just changed the contact name.
I also considered the flashlight mentioned upstairs, but given that C's profession is a geologist, the possibility of his flashlight running out of power in half an hour is very low.
A and the security guard could be accomplices in the theft, but this conclusion is a bit unrealistic.
One point, the last paragraph says the detective looked at what they were holding, then looked around, and immediately knew who the thief was. First, he ruled out Ding, tickets, black hat, flashlight.
From 8:00 in the morning until before 18:00 in the afternoon, there's no need for a flashlight at all, and under the pretense of being a geologist, you can legitimate your site visits. Arriving here two days ago indicates that it was a roaming crime and not a local.
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