rating: +45+x
Item#: 7733
Containment Class:
Secondary Class:
Disruption Class:
Risk Class:


SCP-7733. Entrance to Site-7733-B is visible in the foreground.

Special Containment Procedures: Civilians are not permitted within 100m of SCP-7733, with toxic long-term soil contamination in place as a cover. Due to limited scheduling slots, use of SCP-7733 is limited to SVIC members.

Description: SCP-7733 is an electronic device taking up most of the interior space of a 2700m2 storage facility (Site-7733-A) located in Qaqortoq, Greenland. It is primarily constructed from electronic components commercially available in the year 1974, although it also includes a number of cold cathode semiconductor switches of unknown origin.

Human operators may interact with SCP-7733 from inside a 10m2 room (Site-7733-B) attached to the outside of Site-7733-A, containing a punched paper tape interface feeding in and out of Site-7733-A. When an operator enters information1 describing a specific real or hypothetical set of conditions and a possible event that could occur within them (a "query")2, after a period ranging from 5 seconds to 19 hours3 SCP-7733 will output one of three possible responses:

  • "Additional Data Requested": SCP-7733 will specify information not included in the initial query. After the operator has entered this data, or rejected the request, SCP-7733 will output another response.
  • "Out of Bounds": Confirmation that empirically-available data is insufficient to calculate the probability of the event4, concluding the query.
  • "Calculation Complete": The calculated probability for that event to have taken place, under assumed conditions of consensus reality, reported in units of Drustons (Drst) up to three decimal points, concluding the query.

The Druston unit appears to serve as a unit measuring the unlikeliness of the event. In simplistic queries, it is seemingly based on a logarithmic expression of the probability ratio. It is unknown if this pattern still applies in queries where conventional estimation is not possible. Calculations over 200000.000 Drst have never been observed, indicating a possible upper limit for SCP-7733's calculations.

Operators may not enter a new query until SCP-7733 has concluded the current query, further limiting the frequency of use. SCP-7733 is able to store information from queries internally, and will refer to it in replicated or similar queries rather than requesting information a second time.

SCP-7733's methods of calculating or estimating probability, including the initial ability to interpret queries, are currently unknown. As SCP-7733 cannot operate when foreign objects are present in the same chamber as the components, very little is currently known about how the device functions, although the exceptional complexity of function and ability to operate over decades without maintenance suggests anomalous properties.

Sampled Testing Documents (Translated):

Thaumiel Use Policy:


Distribution chart of the Druston calculations of non-replicated AAP. The current abnormality threshold of 47636.300 Druston is represented by a blue-red colour boundary.

The Statistical Validation and Interpretation Committee (SVIC) is an independent internal organization of Foundation employees responsible for the identification and validation of Ambiguously Anomalous Phenomena (AAP).

AAP are defined as events of exceptional abnormality which do not obviously run counter to conventional natural laws, and which are therefore empirically indistiguishable from coincidences or series of coincidences. This category includes (but is not exclusive to) phenomena characteristic of many probability-altering, cognition and behaviour-altering and predictive anomalies.

The SVIC must employ a minimum of 300 individuals8 at all times. Members are recruited through internal nomination, and must include experts in the following fields:

The primary duties of the SVIC are:

  • Qualitatively categorize reported phenomena as non-anomalous, ambiguously anomalous or unambiguously anomalous.
  • Operate SCP-7733 in order to validate (or reverify) the abnormality of AAP.
  • Determine the numerical abnormality threshold at which a phenomenon is formally categorized as anomalous.

The categorization and validation duties are handled by temporary subcommittees based on the fields believed to be necessary for understanding and describing the phenomenon in question, as well as providing additional data. The abnormality threshold is determined through majority consensus at mandatory meetings of all SVIC members held every 120 days in the conference hall of the Hans Egede Hotel in Qaqortoq. SVIC members active in subcommittees or meetings are exempt from all other Foundation duties. The internal organization and operation of the SVIC is otherwise determined by the members.

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