REALISM INDEX: 8.5/10 — Plausible with conditions
Ten thousand people live in a buried city. They are governed by a document none of them wrote, enforced by administrators with limited access to its origins, and shown selected images of the outside world. Through season two, Silo has no central AI character or identified machine intelligence running the place.
That absence makes it a useful boundary case for our index. Its threat is a technical and institutional system that people maintain, obey, and cannot easily inspect. We score that system’s realism, not a hypothetical sentient computer hidden in the story.
The Pact is the program
The Pact is a set of inherited instructions. Its apparent aim is to keep the population alive and inside, but most residents cannot examine the reasons behind its rules or change them. The people enforcing it have authority within the system, not necessarily over the system.
That arrangement resembles a problem in real automated decision-making: a rule can keep producing outcomes long after its designers leave, while the people affected have little way to challenge the assumptions. NIST’s AI Risk Management Framework describes AI as socio-technical because its risks depend on institutions and human choices as well as code. Silo makes the institutional part visible without inventing an AI villain.
Bernard, who runs IT, believes deviation from the inherited specification could endanger everyone. The show gives him little room to test that belief openly. He may be protecting the population; he is also protecting a system that restricts what the population can know. That tension is more credible than a simple story about a machine turning evil.
The visor is plausible. The habitat is harder.
Those sent outside to clean the sensor see a green world through their helmet display. People watching from inside see a bleak landscape on the cafeteria screen. The conflicting views show how easily an institution can mediate what counts as evidence. The audience should be wary of assuming either image tells the whole truth.
The display capability is already here. Modern headsets can blend digital imagery with camera passthrough or replace the visible environment entirely. The unsettling part is the deployment: a deliberate decision to make someone’s sensory access to reality depend on equipment controlled by an institution.
The silo’s information controls are believable. Its closed habitat is a much bigger engineering claim. Keeping thousands of people alive underground for generations would require reliable power, air and water recovery, repair capacity, and replacement parts. NASA’s work on closed-loop life support helps explain why this is difficult. The show treats maintenance seriously, but the long-term resilience of the habitat remains its largest technical leap.
Why the institutions ring true
Many dystopias depend on every official being cruel or foolish. Silo builds a more durable arrangement. IT holds the servers, archives, and knowledge of what the rules are for. Judicial has surveillance powers. Public officials have visible authority, but they do not hold every piece of the system. Residents also police themselves through fear of relics and forbidden questions.
Power sits where information sits. The arrangement could outlive its founders because each new operator inherits a role, a reason to comply, and only a partial view of the whole. That is the strongest part of the show’s realism.
Where the story takes a shortcut
Juliette is the exception the plot needs. She combines mechanical competence, access to people in authority, and a reason to doubt the official account. The silo is portrayed as extraordinarily good at suppressing such combinations, yet the story allows one person to accumulate them. It is a convincing protagonist’s journey, but a less convincing institutional failure.
This score covers seasons one and two. Later revelations about the founding may change how well the incentives and engineering hold together. We will reassess the score after reviewing that material.
The four scores
| Category | Score | Why |
|---|---|---|
| Technical feasibility | 8.0 | Synthetic imagery and information controls are plausible; a durable closed habitat is the larger leap. |
| Human behaviour | 9.0 | Taboo, ritual, fear, and dependence do much of the enforcement work. |
| Institutional response | 9.5 | Power follows control of information, and the arrangement can outlive its architects. |
| Causal consistency | 7.5 | One protagonist breaks a system otherwise depicted as exceptionally hard to challenge. |
Calculation: (8.0 + 9.0 + 9.5 + 7.5) ÷ 4 = 8.5/10. These numbers are editorial judgments, not measurements. Read the scoring method.
The verdict
Silo asks a question that belongs in any discussion of AI and power: who can inspect the rules that govern everyone’s life? Its most convincing machine is an institution built around technology. The show understands how hard that machine is to switch off once people depend on it.
Frequently asked questions
Is Silo about artificial intelligence?
Through season two, there is no central AI character or identified machine intelligence running the silo. The show is about institutional control through rules, records, and technology, which is why it can feel like an AI story.
Is the technology in Silo realistic?
Its information-control tools are plausible. A sealed city supporting thousands of people over generations is far less certain.
What is the Pact in Silo?
It is the inherited ruleset governing life in the silo. Residents and even some enforcers have limited access to the reasons behind it.
Scope and sources: This assessment covers seasons one and two. Apple TV’s series description supplies the premise. NIST, Apple Developer documentation, and NASA provide context for governance, display technology, and life support. The interpretation and scores are ours. Reviewed September 2026.