Description: SCP-055 is a "self-keeping secret" or "anti-meme". Information about SCP-055's physical appearance as well as its nature, behavior, and origins is self-classifying. To clarify:
How Site 19 originally acquired SCP-055 is unknown.
When SCP-055 was obtained, and by whom, is unknown.
SCP-055's physical appearance is unknown. It is not indescribable, or invisible: individuals are perfectly capable of entering SCP-055's container and observing it, taking mental or written notes, making sketches, taking photographs, and even making audio/video recordings. An extensive log of such observations is on file. However, information about SCP-055's physical appearance "leaks" out of a human mind soon after such an observation. Individuals tasked with describing SCP-055 afterwards find their minds wandering and lose interest in the task; individuals tasked with sketching a copy of a photograph of SCP-055 are unable to remember what the photograph looks like, as are researchers overseeing these tests. Security personnel who have observed SCP-055 via closed-circuit television cameras emerge after a full shift exhausted and effectively amnesiac about the events of the previous hours.
Who authorized the construction of SCP-055's containment room, why it was constructed in this way, or what the purpose of the described Containment Procedures may be, are all unknown.
Despite SCP-055's container being easily accessible, all personnel at Site 19 claim no knowledge of SCP-055's existence when challenged.
All of these facts are periodically rediscovered, usually by chance readers of this file, causing a great deal of alarm. This state of concern lasts minutes at most, before the matter is simply forgotten about.
A great deal of scientific data has been recorded from SCP-055, but cannot be studied.
At least one attempt has been made to destroy SCP-055, or possibly move it from containment at Site 19 to another site, meeting failure for reasons unknown.
SCP-055 may present a major physical threat and indeed may have killed many hundreds of personnel, and we would not know it. Certainly it presents a gigantic memetic/mental threat, hence its Keter classification.
