The Claim
Simulation theory proposes that reality as we experience it could be an artificial simulation, possibly run by a highly advanced future civilization. Philosopher Nick Bostrom formalized the modern version in a 2003 academic paper, arguing that if civilizations can eventually run realistic simulations of their ancestors, simulated beings would vastly outnumber “real” ones — making it statistically more likely we're simulated than not.
The Evidence
- Bostrom's peer-reviewed statistical argument, taken seriously across academic philosophy.
- Rapid, real advances in virtual reality and computing power within a single human lifetime.
- Public endorsement of the general idea by prominent scientists and technologists.
The Official Story
Bostrom's own argument is carefully structured as a trilemma, not a proof: he argues that at least one of three statements is likely true, of which “we're probably in a simulation” is only one possible outcome, alongside civilizations never reaching that technological stage, or choosing not to run such simulations at all. It remains a genuinely unresolved, actively debated question in philosophy of mind, not a settled fringe claim.
File Notes
This is one of the few entries in this archive with real, credentialed philosophy departments and physicists actively debating it at conferences, rather than dismissing it outright — the tinfoil hat, for once, comes with some peer review attached.