Part II: Five Five Five Five Five
Item #: SCP-3125
Object Class: Keter
Special Containment Procedures: SCP-3125 is kept inside Cognitohazard Containment Unit 3125 on the first floor of Site 41. This containment unit is a 10m by 15m by 3m cuboidal room clad in layers of lead, soundproofing and telepathic shielding. Access is through an airlock system at one end of the containment unit. This airlock is programmed to allow only one person to enter the containment unit at a time, and to remain locked until this person exits before allowing another person to enter.
Under no circumstances may any coherent information be allowed to leave the containment unit. This includes written and electronic notes, photographs, audio and video recordings, sound, electromagnetic and particle-based signals and psi emanations. During the exit cycle, a purge system rigged to the airlock flushes the occupant's memory by flooding the airlock with amnestic gas for three minutes.
A senior Antimemetics Division staff member must visit SCP-3125 every six weeks (42 days).
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Item #: SCP-3125
Object Class: Keter
Special Containment Procedures: SCP-3125 is subject to inverted containment protocols, and is present everywhere in reality except for those places which have been specifically purged of its influence. The interior of Cognitohazard Containment Unit 3125 on Site 41, where this document resides, is the only location in the world known to have been successfully purged in this way. This containment unit is a 10m by 15m by 3m cuboidal room clad in layers of lead, soundproofing material and telepathic shielding. Access is through an airlock system at one end of the containment unit. This airlock is programmed to allow only one person to enter the containment unit at a time, and to remain locked until this person exits before allowing another person to enter.Under no circumstances may any coherent information be allowed to leave the containment unit. This includes written and electronic notes, photographs, audio and video recordings, sound, electromagnetic and particle-based signals and psi emanations. A purge system rigged to the airlock flushes the occupant's memory by flooding the airlock with amnestic gas for three minutes during the exit cycle.
An alternate SCP entry must be maintained in the main Foundation database, giving only the technical specifications of the containment unit, provisions for senior Antimemetics Division staff to visit the unit's interior on a regular basis, and no description.
Description: SCP-3125 is an extremely large (see full Θ'-dimensional fractal topology, attachment 13), highly aggressive anomalous metastasized meme complex originating externally to our reality and now partially intersecting it.
SCP-3125 is adapted for survival in an ideatic ecology considerably more violent and hostile than our own. (Here, "our own" refers to human head space: the set of all ideas which humans have or are biologically capable of having.) Because humans have no natural exposure to ideas as aggressive as SCP-3125, human minds have no protective evolutionary adaptations against it. Individuals possessed of SCP-3125 become incapable of entertaining weaker, "conventional" ideas, and become instead wholly bodily subordinate to the purpose of serving and disseminating the core concepts of SCP-3125. In addition, although undergoing no outwardly visible physical alteration, they cease to be externally recognisable as human.
SCP-3125 is not yet entirely present in our reality. Upon its arrival, the highly interconnected nature of human knowledge exchange systems means that it will take no longer than twelve hours, possibly as few as four hours, to encompass, dominate and replace all human thought. At this point, "humanity" as an abstract concept, along with all attendant abstracts such as "civilization", "culture", "society", "community" and "family" will have ceased to exist. The Foundation terms such an eventuality an MK-class end-of-world scenario.
The Foundation possesses numerous proven techniques for arresting the spread of such aggressive idea complexes, but these are all rendered unworkable in practice by SCP-3125's autonomic defensive response/boundary layer. Fully assembling a mental picture of SCP-3125 and perceiving its true shape causes SCP-3125 in turn to be able to perceive the observer. It then attacks the observer, killing them. The mechanism of the attack is unclear, but appears to be at least partially physical. "Mental bystanders", individuals whose thoughts and ideas resemble those of the observer, are also attacked. This invariably includes the observer's entire extended research group, and often their close family (parents and offspring).
The attack has the net effect of erasing all knowledge both of SCP-3125 and its attack from the world. This informational "numbing" effect performs a similar function to the anaesthetic saliva of a mosquito's bite, enabling SCP-3125 to evade detection prior to its full incarnation.
Foundation staff discovering SCP-3125 may be able to escape its attack via prompt use of amnestic medication to erase their knowledge of it.
In either case, the net result is that the interior of a suitably shielded containment unit is the only location where it is safe to observe, record or even acknowledge the existence of SCP-3125. Outside of such a containment unit, a true written description of SCP-3125 would constitute a lethal cognitohazard.
SCP-3125 could be effectively neutralized using a machine proposed by the late Dr. Bartholomew Hughes called an irreality amplifier (see schematics, attachment 129). However, as well as requiring tremendous material resources, this machine could not be constructed without its builders understanding why it was being built, which would require an understanding of SCP-3125, which would prove fatal to the project. <!-- Babel? -->
No means of neutralizing SCP-3125 using only the resources in this room is known.