 Item number SCP-645 Object Class Safe Euclid Special Container Procedures SCP-645 is to be kept in a padded crate 2m by 2m by 1m. Personnel within a 10m radius of SCP-645 are to refrain from all statements which may be considered untruthful or deceitful. SCP-645 is to be cleaned after each activation. Description SCP-645 is a large disk of Pavona Zettelmarble with a humanoid face carved into it, similar to the famous Boca de la Verita carving in the Church of Santa Maria and Cosmodine in Rome, Italy. As with the Boca carving, the mouth and eyes are empty holes, unlike with the Boca carving. However, subjects who placed their hands inside SCP-645's mouth describe it as warm and moist. SCP-645 embodies, and has been hypothesized by Foundation folklorists to be the origin of the lie detection property attributed to Boca carving since medieval times. Any subject who tells a lie, see Incident Report 645-N41, while their hand is within the carving's mouth, will activate the carving, which will then bite off the subject's hand at the wrist to swallow it. High-speed cameras have revealed a disk process, which lasts less than 0.3 seconds, involves the manifestation of lips, gingiva, and disproportionately large incisor teeth. The lips cauterize the injury via an unknown mechanism, after which the lips, gingiva, and teeth de-manifest. The force exercised by the teeth has not been accurately measured, but is sufficient to sever a steel rod held in the hand being bitten off. Probes of SCP-645's mouth, in its inert state, have revealed no esophagus. As such, the ultimate fate of the severed hands is unknown. RFID tags implanted in the hands of D-class personnel have been unlocatable, and sonograms of SCP-645 indicate that it is solid pavano zeta marble, with no inclusions. Recovery SCP-645 was discovered during routine archaeological excavations in ███████ Italy, in 19██. The slab of marble bearing the carving was not attached to any building, and had been bricked over. Archaeologists ███████ expressed the opinion that it seemed to have been deliberately buried. Forty-eight hours had been discovered, as SCP-645 mutilated a graduate student who had been participating in the excavation. Foundation agents in the Italian Ministry of Cultural Heritage and Activities intercepted the injury reports and retrieved the objects. D-45951 was enlisted for experiments to study both the criteria by which SCP-645 assesses statements and lies, and the mechanism by which it severed hands. Unexpectedly, D-45951 was able to deduce SCP-645 of the knowledge properties prior to testing. Due to cultural knowledge of the properties, both lorically attributed to the bulk of carving. Consequently, D-45951 disobeyed instructions as to how he should interact with SCP-645, which ultimately revealed further anomalous properties. Transcript of Audio Log Insert your left hand into the carving's mouth. Good. Now, say the phrase, the sky is bright green. D-45951, the sky is green, is what these guys told me to say. What was that? Why didn't it activate? Let's try another one. D-45951, say this, I have six fingers. These guys want me to say, I have six fingers, but really I don't. I definitely heard him that time. What do you think you're doing? You're interfering with the experiment. That was a movie. What? In the movie, there was a statue thing that looked like this one, and they said if you put your hand in and lie, it bites your hand off. Subsequently identified as Roman Holiday 1953, Paramount Pictures, starring Audrey Hepburn and Gregory Peck. That's ridiculous. Are you going to comply with instructions, or do we have to get the guard involved? No way. Let's hear him out. Surely intent matters. Do you want me to, uh, hmm, you know, that's actually a very good… At this point, D-45951 removes his hand from SCP-645's mouth. Hey, keep your hand in. Guard, hold his arm. Keep his hand in his mouth. D-45951's hand is forcibly reinserted in the SCP-645's mouth. Let's see, where were we? Oh yes. What was this movie about? Plot synopsis omitted. Hmm. Well, we'll have someone look that up. Thank you for the information, but honestly, you know the difference between movies in real life, don't you? Do you really think that carving will bite your hand off just because some guy in a movie told a story about it? You even said that guy in the movie was lying about it, right? I don't know. I, uh, look, I wouldn't have believed, I mean, I don't think I would have believed it. Before I came here and saw all the weird shit you guys got here, all the monsters and shit, but now that I've seen it all, it made me think maybe it, I mean, that's how I'm explaining it right now. It didn't all go through my head word for word right then, but you know people, I mean, a lot of people, maybe not everybody in the world, I don't know. A lot of people are like that. What's the question? I lost, I kind of lost track only, kind of. I mean, we're still talking about the statue, right? Uh, yes. Do you think just because of the movie that the, uh, yes. Do you think just because of the movie that the statue will, oh, right, right. Yeah, I will. I don't know for sure, but I'm thinking that the maybe it will because of, well, because of a bunch of stuff, like part of it is that movie that I, that I saw a part of on TV one time. I mean, at least one time. And I thought it was just a load of crap. I mean, uh, looking back at what I was thinking back then, then I guess I didn't really believe it because it was just something in a, I thought it was just something in a movie and stuff in movies isn't, uh, I mean, a lot of stuff in movies isn't, isn't really real. Not like real life is at least that's what I always thought, except not always like all the time, oh God, please don't bite my hand off. Interesting. Let's see what we had on the list. Ah, yes, D45951. What's your name? That's kind of complex. I mean, the question isn't, I guess the question isn't complicated, but the answer is, is kind of complicated. Like, uh, the name that everybody called me, well, not everybody, everybody, not like everybody in the world, but you know, people in my life, most of the, uh, a lot of the people in my life, they called me. But when I was born, my name was, I mean, like a little while after I was born, my parents said my name was, so that could be my name too, sort of, and, uh, you guys call me D45951, or that's what you've been calling me. Maybe you'll change your mind later. I don't know. It's up to you. I guess. Fascinating. How about D45951? Today, 2,809 is a prime number. Are you fucking serious? I... Guard? No. No. I'll... Look. I don't know what that, I mean, I know those words by themselves, but the whole thing doesn't. I mean, uh, obviously, it's some sort of, well, obvious, maybe isn't the right word, but I guess it's some kind of math thing. Like, I remember hearing about prime numbers on the... I kind of remember hearing about them, and I kind of think it was on the news, but I'm not, like, a hundred percent sure, oh jeez. And I was never, well, I mean, when I was in school, I wasn't... I didn't do that good in math when I was in school a lot of the time, except when I cheated, except maybe that's not the same as me doing good in math, and, uh, I guess I did okay back when I was real little, and it was super simple. Impressive. I'm about... Yeah, that's a good one. D45951, do you ever lie? No, I mean, I, I, uh, everybody I told, I used to tell in the past I said stuff that maybe wasn't, okay, no, maybe stuff that wasn't true, but I'm not gonna, I mean, I don't think I'm gonna, I mean, right now, with my hand stuck in this thing's mouth, I'm trying real, real hard not to say anything if not super absolute true. Wow, you're really, really scared, aren't you? Oh fuck yes. Just because of the movie? Look, we went, I mean, I went over that already. It's come to the movie that I know, that I think I know what it is, and seeing all the monst... Seeing the monsters you got here, I don't know if I saw all of them. Seeing the monsters of what tells me that it's for, that maybe it's for real. Plus, I mean, why would you be doing this stuff with me sticking my hand in here, and then you telling me to say shit if you weren't expecting it to bite my hand off, right? Why else would you have this ass, this guy holding my arm so I can't, so I probably can't pull my hand out? He has a point. Oh, don't go feeling sorry for him. See, 45951, do you deserve this? Uh, what? This, the way we're treating you, being D-Clatch personnel, do you deserve it? You don't have to yell at me. Did you commit the crimes you were convicted of committing? Yes, or no? I... Look, the fucking cop with self-defense, okay? Her or me, right? And the others? Were they all self-defense too? Uh, sir? Well, I, I mean, look, they were witnesses and, I mean, they coulda, I mean, I thought they coulda, I, I, look, it was, I, I, I mean, no, you know what, no, they fucking weren't self-defense. I didn't think I had to kill them, I didn't think I had no fucking choice. I killed them because I wanted to, because I wanted them to be dead, because I like killing, because I like the way it makes me feel, because it means I have power. That honest enough for you, you big stone fuck? At this point, SCP-645 forcibly ejected D-45951's hand from its mouth. High-speed cameras showed that his lips manifested, and then contorted, apparently spitting the hand out. The lips had completely de-manifested within 0.2 seconds. What the fuck? Did you take your hand out? Put your hand back in. Guard, put his hand back in. No, I, I can't. It won't go in. It's not accepting his hand, sir, it's blocking him. What? Subsequent examination revealed that, although Dr. Rensberg, Dr. Long, and Guard Dickinson were each able to insert a hand in the SCP-645's mouth, D-45951 was not. That was aborted. Get him out of here. We'll have to requisition another D-class. Preferably one who doesn't watch romantic comedies. D-45951 is escorted out of the testing chamber. Well, at least we got some results. I wonder what specifically triggered it to reject his hand. Heh, maybe he really was honest enough for it, creepy little fucker. Hey, that reminds me. How did you know the details about what he said? Seriously, man? I was bluffing. At this point, SCP-645 opened his mouth to a width of approximately 70 cm, and proposed an elongated frog-like tongue 4 meters across the room at Dr. Rensberg and Long. The tongue coiled around Dr. Rensberg's right wrist and severed his hand, then retracted, colliding with Dr. Long and breaking his left shoulder in the process. The tongue had fully returned to the mouth, and the mouth had returned to its normal size within 0.7 seconds. Both doctors survived as a result of prompt medical attention. However, Dr. Rensberg's hand was too badly damaged to be reattached. Note, after a thorough review of not only incident 645-N41, but of all footage of personnel in proximity to SCP-645, I have come to the conclusion that SCP-645 is the only with most likely sapient. This was not the first time that personnel in proximity to SCP-645 have lied or otherwise been less than honest. However, in light of D-45951's admittedly impressive performance in avoiding any untruth, and of 645's unprecedented rejection of his hand, I feel that 645's attack on Dr. Rensberg, a mainly after he admitted to having deceived D-45951, was a conscious act, motivated by resentment and antipathy. Incident 645-N41 also revealed that the scope of 645's anomalous properties is far greater than we had suspected. In particular, it could no longer be considered to pass the locked box test. I therefore request that its object class be upgraded to Euclid. Direct Director R. Kocharian, Approved, O5-4