Noting that new site member 
obj_select (account age 5 hours, site application processed just now) has a sandbox with AI generation indicators: https://scp-sandbox-3.wikidot.com/obj-select
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[[include :scp-wiki:theme:black-highlighter-theme]]
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[[include :scp-wiki:component:anomaly-class-bar-source
|item-number= XXXX
|clearance= 1
|container-class= esoteric
|secondary-class= N/A
|secondary-icon= smlt.wdfiles.com/local--files/shineshadowd%3Agyd4/NA.svg
|disruption-class= dark
|risk-class= notice
]]
**Item #:** SCP-XXXX — Threshold Loss
**Special Containment Procedures:**
There is currently no known method of containing SCP-XXXX. Containment is deemed infeasible due to SCP-XXXX’s apparent omnipresence within all architecture. Any structure involving spatial division and passageways is a potential host.
**Description:**
SCP-XXXX manifests when an individual transitions between spatial environments, such as moving from one room to another. The phenomenon has been observed with thresholds including doors, elevators, hatches, and open archways. Its effects include mild confusion and complete memory loss of the SCP-XXXX encounter. SCP-XXXX exhibits antimemetic properties, preventing any direct observation or preservation of data during its occurrence.
All knowledge regarding SCP-XXXX is based on indirect evidence and inductive reasoning derived from comparing test objectives and outcomes. Analysis suggests SCP-XXXX can manifest universally and concurrently in multiple locations.
Subjects exposed multiple times to SCP-XXXX report recurring nightmares and persistent paranoia. While no other symptoms have been conclusively linked, Dr. Mercer notes that further effects may be obscured by SCP-XXXX’s antimemetic influence.
> "I have to say, it is weird that we only chose test subjects that already suffered from anxiety or depression for testing this SCP. What if they didn't have it before we started testing and we only remember it that way? We know that SCP-XXXX is capable of something like that. Or at least, we think we know. Hell, who knows what we actually know and what we think we know."
> — Dr. Mercer
In rare cases, SCP-XXXX has resulted in the apparent total erasure of individuals. Victims are classified as Type-U disappearances, or "Unperson" cases. These events are marked by complete loss of the subject's identity from all memory, documentation, and physical reality. It is unclear whether this is a literal erasure or a powerful memetic distortion mimicking the effect of such an event.
Mnestic testing has yielded limited results:
* **Class W, X, and Y mnestics:** No measurable effect.
* **Reality anchors:** No effect on their own or when combined with mnestics.
* **Class Z mnestics:** Inconclusive. (See Addendum XXXX.4)
All Kant counter readings during SCP-XXXX events were lost or corrupted. Whether SCP-XXXX manipulates reality or merely perception remains unknown.
The proposal to dismantle or destroy all instances of spatial architecture as a means of containment was formally proposed and subsequently dismissed due to its impracticality, catastrophic socio-economic consequences, and a Foundation-wide consensus that such action would be, quote, “Too dumb to even consider.”
Time appears to continue normally during SCP-XXXX events. Data gaps of approximately 3.5 seconds are typical, aligning with the memory loss and confusion reported by subjects. It is believed SCP-XXXX is active during this window.
------
[[collapsible show="Addendum XXXX.1 — Test Log" hide="- Hide"]]
**Subject:** D-762
[[div class="blockquote" style="border-radius: 10px; margin: 10px"]]
**Testing Video Log Transcript**
[Begin Log]
**Researcher:** D-762, please open the door and enter Room A.
**D-762:** Alright. What now?
**Researcher:** How are you feeling?
**D-762:** Normal?
**Researcher:** Please go back to Room B.
**D-762:** Okay.
*pause*
**D-762:** What now?
**Researcher:** Please go back to Room A.
**D-762:** Okay.
**Researcher:** How are you feeling?
**D-762:** Same as before.
**Researcher:** Please go back to Room B.
**D-762:** Are you kidding me?
**Researcher:** No. Do as you are told.
**D-762:** Fine, but why?
**Researcher:** How are you feeling?
**D-762:** Annoyed. How long do I have to do this?
**Researcher:** Please go back to Room A.
**D-762:** Ugh. Fine.
**Researcher:** How are you feeling?
**D-762:** I... I'm fine. Why did I go in here?
**Researcher:** Do you not recall?
**D-762:** No, wait, you told me to... right?
**Researcher:** Yes. Thank you for your cooperation. You may go back to your cell.
**D-762:** What the fuck.
[End Log]
[[/div]]
[[/collapsible]]
------
[[collapsible show="Addendum XXXX.2 — Post-Test Interview" hide="- Hide"]]
**Subject:** D-892
**<Begin Log>**
> **Researcher:** How are you feeling, D-892?
> **D-892:** What do you think?
> **Researcher:** Excuse me?
> **D-892:** I'm on death row. Do you think I enjoy this?
> **Researcher:** I meant about the test.
> **D-892:** What about it?
> **Researcher:** You were confused.
> **D-892:** Yes. Happens to everyone, doesn’t it? Forgetting why you came into a room.
> **Researcher:** You were explicitly told to enter that room.
> **D-892:** So?
> **Researcher:** Why did you feel confused?
> **D-892:** I... I don’t know.
> **Researcher:** Between hearing the command and feeling confused, what did you feel?
> **D-892:** I guess... *expression shifts* watched.
> **Researcher:** Watched?
> **D-892:** I know I was alone in there, but... *pauses*
> **Researcher:** Please continue.
> **D-892:** I must have imagined it.
> **Researcher:** Imagined what?
> **D-892:** I don't know. Something watching me. Following me.
> **Researcher:** And you didn't mention this during the test?
> **D-892:** Mention what?
> **Researcher:** Something following you?
> **D-892:** Something followed me?
> **Researcher:** You just said that’s what you recall.
> **D-892:** I said I don’t know.
**<End Log>**
[[/collapsible]]
------
[[collapsible show="Addendum XXXX.3 — Field Log [REDACTED]" hide="- Hide"]]
[[div class="blockquote"]]
"She was just ahead of me—walked through the door into the hallway. I looked away for a moment, and she was gone. No sound, no trace. When I asked the others, they didn’t even remember bringing her on the team. I tried to look for her file, but I forgot what her name was. I can't even describe what she looked like."
— Agent █████, Anti-Memetics Division
[[/div]]
**Note:** Agent █████ had been administered Class W mnestics prior to this report.
[[/collapsible]]
------
[[collapsible show="Addendum XXXX.4 — Mnestic Test Log" hide="- Hide"]]
**Subject:** D-8999
**Procedure:** Administered Class Z mnestic 45 minutes prior to testing. Subject response deemed unreliable due to mental deterioration, but log retained for notable anomalies.
[[div class="blockquote" style="border-radius: 10px; margin: 10px"]]
**Testing Video Log Transcript**
[Begin Log]
[00:00] D-8999 administered Class Z compound.
[00:45]
**Researcher:** D-8999, please enter Room A.
**D-8999:** *[in pain]* What? What did you give me?
**Researcher:** Please enter Room A.
**D-8999:** *[heavy breathing]* There are so many... worms.
**Researcher:** Please ignore them. They are not relevant to the test.
[00:47] Subject stumbles into Room A.
**Researcher:** How do you feel?
**D-8999:** Awful. What is happening to me?
**Researcher:** Please enter Room B.
**D-8999:** Why are you doing this to me?
[00:49] Subject stumbles into Room B.
**Researcher:** How do you feel?
**D-8999:** Are you enjoying yourself? Seeing me suffer?!
(*Several transitions omitted for brevity.*)
[00:56]
**Researcher:** Please enter Room B.
**D-8999:** *[screaming]* WHAT THE FUCK WAS THAT?! WHY WAS IT LOOKING AT ME?!
**Researcher:** Please describe what you saw.
**D-8999:** GET ME OUT OF HERE, PLEASE!
**Researcher:** Describe it.
**D-8999:** I BEG YOU—PLEASE GET ME OUT!
[00:57] Subject collapses, convulsing.
**Researcher:** D-8999, what did you see?
**D-8999:** *[whispering]* OUT... OUT... ME... OUT...
[00:58] Subject ceases movement.
[End Log]
[[/div]]
**Note:** Subject expired at 00:58 from the effects of the Class Z mnestic compound. No biological abnormalities were discovered during post-mortem examination. Recordings of D-8999’s biometric telemetry were corrupted beyond recovery. No file of a D-class with the designation 8999 exists. All attempts to recall or reconstruct D-8999’s personnel file postmortem have failed. The only recorded instance of D-8999 is the above log.
[[/collapsible]]
------
[[collapsible show="Addendum XXXX.5 — Unattributed Statement" hide="- Hide"]]
[[div class="blockquote"]]
"Addendum 4 should absolutely be included. Class Z doesn’t cause hallucinations. Whatever she saw, it was real. This should be classified Apollyon. We can't contain it, and everyone is at risk of being erased from existence.
Since I noticed it happening to me, I’ve had the dreams too. What if I don’t wake up one day because I was never real? No funeral, no name, no face.
If we redact information, there is at least a gap, something that once was.
This is like never having read the damn thing. Just pure, permanent non-being."
— Dr. ████████
[[/div]]
**Note:** No author for this addendum has been identified.
[[/collapsible]]
------
[[collapsible show="Addendum XXXX.6 — Termination Order" hide="- Hide"]]
Due to the implications of Addenda XXXX.4 and XXXX.5, all further testing involving SCP-XXXX has been terminated. Due to the apparent impossibility of containment and quote, "horrifying inevitability for its victims," further interaction with SCP-XXXX has been deemed an unnecessary and unjustifiable risk to personnel morale and safety. No further addenda are to be added unless viable containment is achieved.
[[/collapsible]]
[[div class="footer-wikiwalk-nav"]]
[[=]]
<< [[[SCP-XXXW]]] | SCP-XXXX | [[[SCP-XXXY]]] >>
[[/=]]
[[/div]]
Excerpts of note:
Item #: SCP-XXXX — Threshold Loss
Special Containment Procedures:
There is currently no known method of containing SCP-XXXX. Containment is deemed infeasible due to SCP-XXXX’s apparent omnipresence within all architecture. Any structure involving spatial division and passageways is a potential host.
In rare cases, SCP-XXXX has resulted in the apparent total erasure of individuals. Victims are classified as Type-U disappearances, or "Unperson" cases. These events are marked by complete loss of the subject's identity from all memory, documentation, and physical reality. It is unclear whether this is a literal erasure or a powerful memetic distortion mimicking the effect of such an event.
[[collapsible show="Addendum XXXX.5 — Unattributed Statement" hide="- Hide"]]
[[div class="blockquote"]]
"Addendum 4 should absolutely be included. Class Z doesn’t cause hallucinations. Whatever she saw, it was real. This should be classified Apollyon. We can't contain it, and everyone is at risk of being erased from existence.
Since I noticed it happening to me, I’ve had the dreams too. What if I don’t wake up one day because I was never real? No funeral, no name, no face.
If we redact information, there is at least a gap, something that once was.
This is like never having read the damn thing. Just pure, permanent non-being."
— Dr. ████████
If the user attempts to post their AI material to the mainsite or request critique on it, recommending membership revocation.
